Thursday, August 5, 2010

General Questions and Answers about Process Costing System:

Questions:

  1. What is the primary objective in process costing?
     
  2. Job order and process costing procedures are used by different types of industries. Discuss the procedure appropriate for each type. 
  3. For the following products indicate whether job order costing or process costing procedures would be required.

    (a) Gasoline (b) Sewing machines (c) Chocolate syrup (d) Text books (e) Dacron yarn (f) Cigarettes (g) Space capsules (h) Men's and women's suites.
     
  4. What are the distinguishing characteristics of process costing procedures?
     
  5. Discuss three product flow formats.
     
  6. Compare the cost accumulation and summarizing procedures of job order costing and process costing.
     
  7. Can predetermined overhead rates be used in process costing?
     
  8. Would one expect to find service departments in a firm using process costing? If so, how would they be be handled? Would cost of production reports be used for service departments?
     
  9. What is the the purpose of a cost of production report?
     
  10. What are the various sections of a cost of production report?
     
  11. Separate cost of production reports are prepared for each producing department. Whey is this method used in preference to one report for the entire firm?
     
  12. Are month-to-month fluctuations in average unit cost computed in a cost of production report meaningful data in attempting to control costs?
     
  13. What is the equivalent units of production? explain in terms of its effect on computed unit costs.
     
  14. In process costing, physical inventories of work in process must be taken at the end of each accounting period. Ordinarily, all department heads are responsible for their own inventories, and the methods they use to determine such data are crude by comparison with procedures used for determining year end physical inventory. It is not unusual for a department head to estimate rather than count inventories is process. Consequently, figures are bound to save errors. Is this good practice or should more accurate methods be used, such as having inventory teams determine inventories?
     
  15. What is the justification for spreading the cost of lost units over the remaining good units? Should the cost of these units ever be charged to overhead? Will the answer be different if un its are lost (a) in the originating department, (b) at the beginning of a department's operations, (c) during operations, or (d) at the end of operations?
     
  16.  (a) What is difference between normal and abnormal loss? (b) Explain how both should be reported for management purposes.
     
  17. Select the answer which best completes the statement.
    (a) A characteristics which applies to process costing but not to job order costing system: (1) identifiable batches of production; (2) equivalent units of production; (3) averaging process; (4) use of standard costs
    (b) In processing goods through a factory, materials are successively run through producing departments A, B, and C.  For product costing purposes, Department B should treat items received from department A as: (1) materials; (2) work in process; (3) finished goods; (4) equivalent units.
    (c) The type of spoilage that should not effect the recoded cost of inventories is: (1) abnormal spoilage; (2) normal spoilage; (3) seasonal spoilage; (4) standard spoilage.
    (d) Transferred in costs in a cost of production report are most similar to: (1) materials added at the beginning of the process; (2) conversion costs added during the process; (3) costs transferred to the next process; (4) costs included in beginning inventory. 

Answers:

  1. The primary objective in process costing is to determine the costs of materials, labor, and factory overhead (FOH) used to process units of production through each department, thereby determining the cost of a finished unit. The ultimate objective is to control costs.
     
  2. The nature a firm's manufacturing operations determines whether job order costing or process costing procedures are used. If costs can be associated and accumulated by orders, job order costing will be used; if operations are more or less continuous and identity of orders is lost, process cost is applicable.
     
  3. (a) Process (b) Process - for stock items (c) Process (d) Job order (e) process (f) process (g) Job order (h) process
     
  4. The distinguishing characteristics of process cost procedures are:
    (a) A cost of production report is used.
    (b) Production is accumulated and reported by departments.
    (c) Costs are posted to departmental work in process accounts.
    (d) Production in process at the end of a period is restated in terms of completed units.
    (e) Total departmental costs is divided by total departmental production to complete unit costs.
    (f) Costs are transferred from one department to another to arrive at a final unit cost for the completed product.
     
  5. Three product flow formats are: sequential, parallel, and selective:

    Sequential Product Flow:
    In a sequential product flow, each item manufactured goes through the same set of operation. Materials are placed into production in the Blending Department, and labor and factory overhead are added. When the work is finished in the Blending Department, it moves to the Testing Department. The second process, and any succeeding processes, may add more materials or simply work on the partially completed input from the preceding departments, adding only labor and factory overhead, as in this example. After the product has been processed by the Terminal Department, it is a completed product and becomes a part of finished goods inventory.

    Parallel Flow:
    In a parallel product flow, certain portion of the work are done simultaneously and then brought together in a final process or processes for completion and transfer to finished goods inventory. As in the previous illustration, materials may be added in subsequent processes.

    Selective Product Flow:
    In a selective product flow, the product moves to different departments within the plant, depending upon the desired final product. For example, in meet processing, after the initial butchering process, some of the product goes directly to the Packaging Department and then to finished goods inventory; some goes to the Smoking Department and then to the Packaging Department and finally to finished goods inventory; Some goes to the grinding department, then to the packaging department and lastly to finished goods inventory. Transfer of costs from the Butchering Department involves joint cost allocation, discussed on By-Products and Joint Products Costing page.
     
  6. materials costs - In job order costing, materials requisitions are used and charges made to order; in process costing, charges are to departments, with infrequent use of materials requisitions.

    Labor Costs - Time tickets are use din job order costing to accumulate costs by jobs; In process costing, labor costs are charged to departments, and therefore detailed time records are not necessary.

    Factory Overhead - Job costing requires the use of predetermined overhead rates for charging overhead to orders; In process costing, actual overhead may be used, and the need to distinguish carefully between direct and indirect materials and labor does not exist. However, predetermined rates are desirable under certain conditions.

    Summarizing Costs - A job order cost sheet is used to accumulate the costs of an order in job order costing system; a cost of production report is used in process costing system. In job order costing, costs are summarized on completion of an order; in process costing, periodic weekly or monthly summaries determine unit costs.
     
  7. Predetermined overhead rates can and should be used if production is not stable or if factory overhead is significant cost. As stated frequently, the charging of actual overhead to orders or products may result in improper costs Furthermore, the clerical detail connected with actual overhead can become quite cumbersome and cause delay in the execution of efficient and timely costing.
     
  8. The existence of service departments does not depend on a company's order or process cost procedures. It depends mainly on the needs of the manufacturing operations. Therefore, in process costing, service departments are also used and handled. In the same way as in job order costing. Of course, no cost of production reports for service departments would be needed, but departmental expense analysis sheets would still be used.
     
  9. A cost of production report is an effective weekly or monthly summary of materials, labor, and factory overhead consumed by each department or cost center, along with a record of units of output. It provides essential data to those responsible for cost control.
     
  10. The various sections of a cost of production report are: (a) cost transferred from a preceding department, (b) materials, labor, and factory overhead added by a department, (c) unit costs added by a department, (d) unit and total costs accumulated to the end of operations in a department, (e) the cost of beginning and ending work in process inventories, and (f) cost transferred to a succeeding department or to a finished goods storeroom.
     
  11. Separate departmental cost of production reports are used to control costs successfully and to accumulate costs more accurately. In many instances total company cost of production reports could not be used because of the various stages of work in process.
     
  12. As long as fluctuating average unit costs are not caused by fluctuating production volumes, they are meaningful data in the control of costs. In such cases the fluctuations can be traced to improved or decreased efficiencies, which could lead to improve cost control.
     
  13. The equivalent production figure for a department represents the number of units that could have been completed from materials, labor, and overhead used during a period. It is computed by restating units in process at the end of a period in terms of completed units and adding this figure to the number of units actually completed. This explanation assumes no beginning work in process inventories. A department's equivalent production is divided into its costs to compute departmental unit costs. Therefore, production figures have a direct effect on computed unit costs.
     
  14. The need for accuracy in determining work in process is in a large part determined by the materiality of the inventory which, in many instances, is rather small or insignificant. Whenever an inventory figure is needed, the quantitative data will ordinarily come from departmental supervisors. The cost department will apply  cost data. Quantitative data based on actual physical counts are desirable, but estimates based on the capacity of various equipment, such as holding tanks, can be quite acceptable. The validity of estimates can be determined through analysis of reasons for higher or poor estimate of work in process. In most instances, the use of a permanent inventory team is impractical not only because work in process values are usually  not substantial, but because determination of the quantity of work in process can be performed best by departmental personnel familiar with the product and factory operations.
     
  15. Whenever a loss of units is normal in producing the final units, the good units completed absorb all costs, resulting in a spreading of the cost of lost units over the remaining good units. When abnormal or unusual losses occur, the cost ordinarily assigned to any such lost units might be charged to factory overhead or to a current period expense account. This method results in the assignment of normal (nonloss) costs to remaining good units.

    When units are lost in departments subsequent to the first, an adjustment must be made to the unit cost representing work done in preceding departments. The fewer units must absorb the preceding department's costs, resulting in an increase in that department's unit cost.

    Ordinarily, there is no difference in completed unit costs whether units are lost at the beginning or during operations. The cost of lost units is spread over remaining good units including those still in process. However, when units are lost at the end of operations, after completion, or are otherwise identified as not pertaining to work in process units, the cost of these lost units is customarily assigned to finished units only. No lost unit cost is assigned to units still in process.
     
  16. (a) Normal spoilage arises under normal, efficient operating conditions; i.e., it is inherent in the production process and is uncontrollable in the short run. Abnormal spoilage is not expected under the normal, efficient operating conditions; i.e., it is not inherent in the production process and management usually considers it avoidable or controllable. Thus, by definition, the critical factor in distinguishing between normal and abnormal spoilage is the degree of controllability of units spoiled.  Any spoilage that occurs during a production process  functioning within the expected usual range of performance is considered normal. Any spoilage occurring in amounts in excess of the defined usual range is considered abnormal (controllable).

    (b) Conceptually the cost of normal loss should be included in the cost of good units produced because of its association with normal production. Likewise, the cost of abnormal loss should be accounted for as a loss because of its abnormal unusual nature and should be separately identified as a loss on reports for management.

    For practical reasons, there may be no distinction between normal and abnormal loss in reports for management, since it is sometimes very difficult (or impossible) to do so. The production process may be relatively new or the process may be altered often enough to make such a distinction impractical or too costly. Whenever possible, however should be made and accounted for as discussed in the preceding paragraphs.
     
  17. (a) 2
    (b) 1
    (c) 1
    (d) 1

Combined Cost of Production Report (CPR) - Process Costing:

The three cost of production reports for the Clonex Corpora have been discussed and computed separately.
These reports would most likely be consolidated in a single report summarizing manufacturing operations of the firm for a specific period. Such a report, as illustrated below, should be reviewed in order to observe the interrelationship of the various department reports.
The Clonex Corporation
Cost of Production Report
All Producing Departments
For the Month of January, 19        
Quantity Schedule: Blending 1st Department Testing 2nd Department Terminal 3rd Department
Units started in process 50,000
======
   
Units received from the preceding department   45,000
======
40,000
======
Units transferred to next department 45,000 40,000  
Units transferred to finished goods storeroom     35,000
Units still in process 4,000 3,000 4,000
Units lost in process 1,000
-------
2,000
-------
1,000
-------
  50,000
======
45,000
======
40,000
======
Cost Charged To the Department: Total
Cost
unit cost Total
cost
unit
Cost
Total cost unit
Cost
 
Cost from preceding department:
 
     
Transferred in during the month     $77,400 $1.72 $140,400 $3.51
      -------- ----- -------- -----
Cost added by the department:
 
     
Materials $24,500 $.50        
Labor 29,140 .62 $37,310 $.91 $32,400 $.90
Factory Overhead (FOH) 28,200
-------
.60
----
32,800
-----
.80
----
19,800
-------
.55
----
Total cost added $81,840 $1.72 $70,110 $1.71 $52,200 $1.45
Adjusted for lost units
    $.08   $.09

------- ---- ------- ----- -------- ----
Total cost to be accounted for $81,840 $1.72 $147,510 $3.51 $192,600 $5.05

====== === ====== === ====== ===
Cost Accounted for as Follows:      
Transferred to next department $77,400 $140,400  
Transferred to finished goods storeroom (35,000 × $5.05)     $176,750
Work in process - ending inventory:

 
Adjusted cost from preceding department [4,000 × ($3.51 + $0.09)]
 

$5,400

$14,400
Materials $2,000    
Labor (4,000 × 1/4 × $0.90) 1,240 910 900
Factory Overhead (4,000 × 1/4 × $0.55) 1,200
------
800
------
550
------
  4,440
--------
7,110
------
15,850
--------
Total cost accounted for $81,840 $147,510 $192,600

====== ====== ======
 
Dear visitor! Do you like this article? If you like, then please bookmark this page and also share with your friends. Thank you for your support.

Cost of Production Report - Terminal Department (3rd - Final Department):

We recommend to see the cost of production report of the first and second department before you continue.
  1. Click here to see the cost of production report of the first department
  2. Click here to see the cost of production report of Second Department
The cost of production report of 3rd and final department is illustrated below:
The Clonex Corporation
Terminal Department (3rd Dept.)
Cost of Production Report
For the Month of January, 19        
Quantity Schedule:    
Units received from the preceding department   40,000
======
Units transferred to finished goods storeroom 35,000  
Units still in process (1/4 labor and FOH) 4,000  
Units lost in process 1,000 40,000
======
Cost Charged To the Department: Total
Cost
unit
Cost
 
Cost from preceding department:
Transferred in during the month $140,400 $3.51
Cost added by the department:
Labor 32,400 0.90
Factory Overhead (FOH) 19,800
-------
0.55
-----
Total cost added $52,500 $1.45
Adjusted for lost units 0.09*

------- ------
Total cost to be accounted for $192,600 $5.05

====== ======
Cost Accounted for as Follows:    
Transferred to finished goods storeroom (35,000 × $5.05)   $176,750
Work in process - ending inventory:

Adjusted cost from preceding department [4,000 × ($3.51 + $0.09)]
$14,400

Labor (4,000 × 1/4 × $0.90) 900
Factory Overhead (4,000 × 1/4 × $0.55) 550
------
15,850
------
Total cost accounted for
$192,600


======



Additional Computations:
Equivalent Production:
Labor and factory overhead = 35,000 + 4,000 / 4 = 36,000 units
Unit Costs:
Labor = $32,400 / 36,000 = $0.90 per unit
Factory overhead = $19,800 / 36,000 = 0.55 per unit
*Adjustment for lost units:
Method No.1: $140,400 / 39,000 = $3.60; $3.60 - $3.51 = $0.09 per unit
Method No.2: 1,000 units × $3.51 = $3,510; $3,510 / 39,000 = $0.09 per unit

Explanation:

Total and unit cost figures were derived by using procedures discussed for the cost of production report of the Testing Department. The work completed is transferred to the finished goods storeroom; thus, the title "Transferred to finished goods storeroom" is used in place of the title "Transferred to next department." Cost charged to the Terminal Department come from the payroll distribution and the department's expense analysis sheet. The journal entry transferring costs from the Testing Department follows:
Work in process - Terminal Department                            140,000
           Work in process - Testing Department                            140,000
The entry to transfer finished units to the finished goods storeroom is presented below:

Cost of Production Report - Testing Department (2nd Department):

Learning Objective:
  1. Prepare a cost of production report of second department in a process costing system.
  2. How  lost units are treated in process costing system when a cost of production report of subsequent to the first department is prepared?
  3.  
    We recommend to see the cost of production report of the first department before you continue.
    Click here to see the cost of production report of the first department

    The Clonex Corporation
    Testing Department (2nd Dept.)
    Cost of Production Report
    For the Month of January, 19        
    Quantity Schedule:    
    Units received from the preceding department   45,000
    ======
    Units transferred to next department 40,000  
    Units still in process (1/2 labor and FOH) 3,000  
    Units lost in process 2,000 45,000
    ======
    Cost Charged To the Department: Total
    Cost
    unit
    Cost
     
    Cost from preceding department:
    Transferred in during the month $77,400 $1.72
    Cost added by the department:
    Labor 29,140 0.91
    Factory Overhead (FOH) 28,200
    -------
    0.80
    -----
    Total cost added $81,840 $1.71
    Adjusted for lost units 0.08*

    ------- ------
    Total cost to be accounted for $147,510 $3.51

    ====== ======
    Cost Accounted for as Follows:    
    Transferred to next department (40,000 × $3.51)   $140,400
    Work in process - ending inventory:

    Adjusted cost from preceding department [3,000 × ($1.72 + $0.08)]
    $5,400

    Labor (4,000 × 1/2 × $0.60) 910
    Factory Overhead (4,000 × 1/2 × $0.60) 800
    ------
    7,110
    ------
    Total cost accounted for
    $147,510


    ======



    Additional Computations
    Equivalent Production:
    Labor and factory overhead = 40,000 + 3,000 / 3 = 41,000 units
    Unit Costs:
    Labor = $37,310 / 41,000 = $0.91 per unit
    Factory overhead = $32,800 / 41,000 = 0.80 per unit
    *Adjustment for lost units:
    Method No.1: $77,400 / 43,000 = $1.80; $1.80 - $1.72 = $0.08 per unit
    Method No.2: 2,000 units × $1.72 = $3,440; $3,440 / 43,000 = $0.08 per unit

    Explanation:

    The Blending Department (first department) transferred 45,000 units to the Testing Department, where labor and factory overhead were added before the units were transferred to the Terminal Department (third or final department). Costs incurred in the testing department resulted in the additional departmental as well as cumulative unit costs.
    The cost of production report of the testing department differ from that of the Blending Department (first department) in several respects. Several additional calculations are made, for which space has been provided on the report. The additional information deals with:
  4. Cost received from the preceding department.
  5. An adjustment of the preceding department's unit cost because of lost units.
  6. Cost received from the preceding department to be included in the cost of ending work in process inventory.
The quantity schedule of the Testing Department shows that the 45,000 units received from the Blending Department (first department) were accounted for as follows:
  1. 40,000 units sent to terminal department.
  2. 3,000 units still in process.
  3. 2,000 units lost.
An analysis of the work in process (WIP) indicates that units in process are but one third complete as to labor and factory overhead. Unit costs, $0.91 for labor and $0.80 for factory overhead, were calculated as follows:
Equivalent production of the testing department is 41,000 units [40,000 + $1/3 × (3,000)], the labor unit cost is $0.91 ($37,310 / 41,000), and the factory overhead unit cost $0.80 ($32,800 / 41,000). There is no materials unit cost, since no materials were added by the department. The department unit cost is $1.71, the sum of the labor unit cost of $0.91 and the factory overhead unit cost of $0.80.
The testing department is responsible for the labor and factory overhead used as well as for the cost of units received from the Blending Department (first department). This latter cost is inserted as a cost charged to the department under the title "cost from preceding department" which is immediately above the section of the report dealing with cost added by the department. The cost transferred in was $77,400, previously shown in the cost report of the Blending Department (first department) as cost transferred out of that department by this journal entry:
Work in process - Testing department                    77,400
      Work in process - Blending department                             77,400

The work in process account of the testing department is charged with cost received from the preceding department and with $70,110 of departmental labor and factory overhead (FOH), a total cost of $147,510 to be accounted for by the department.

Units Lost in the Department Subsequent to the First:

The Blending Department (first department) unit cost was $1.72 when 45,000 units were transferred to the Testing Department. However, because 2,000 of these 45,000 units were lost during processing in the Testing Department, the $1.72 unit cost figure no longer applies and must be adjusted. The total cost of the units transferred remains at $77,400, but 43,000 units must now absorb this total cost, causing an increase of $0.08 in the cost per unit due to the loss of 2,000 units in the testing department.
The lost units cost can be computed by one of two methods.

Method No.1:

Determines a new unit cost work done in the preceding department and subtracts the preceding departments old unit costs figure from the adjusted unit cost figure. The difference between the tow figures is the additional cost due to the lsot units. $1.80 new adjusted unit cost for work done in the preceding department is obtained by dividing the remaining good units, 43,000 (45,000 - 2,000), into the cost transferred in, $77,400. The old unit cost figure of $1.72 is subtracted from the revised unit cost to arrive at the adjustment of $0.08.

Method No. 2:

Determines the lost units share of total cost and allocates this cost to the remaining good units. total cost previously absorbed by the units lost is $3,440, which is the result of multiplying the 2,000 lost units by their unit cost of $1.72. The $3,440 cost must now be absorbed by the remaining good units. The additional cost to be picked up by each remaining good unit is $0.08 (3,440 / 43,000 units).
The lost unit cost adjustment must be entered in the cost of production report. The$0.08 is entered on the "Adjustment for lost units" line. The departmental unit cost of $1.71 does not have to be adjusted for units lost. In the testing department, the cost of any work done on lost units has automatically been absorbed in the departmental unit cost by using the equivalent production figure of 41,000 instead of 43,000. The $1.72 unadjusted units cost for work done in the preceding department, the $1.71 departmental unit cost, and the $0.08 adjustment for lost units are totaled in order to obtain the $3.51 cumulative unit cost for work done up to the end of operations in the testing department.

Timing of Lost Units:

Lost units may occur at the beginning, during, or at the end of a manufacturing process. For purposes of practicality and simplicity, it is ordinarily assumed that units lost at the beginning or during the process were never put in process. The cost of units lost is spread over the units completed and units still in process.
When units are lost or are identified as lost at the end of a process, the cost of the lost units is charged to completed units only. No part of the loss is charged to units still in process. Assume that the 2,000 units lost by the testing department were the result of spoilage found at final inspection by the quality control department; their cost would be charged only the 40,000 finished units, as illustrated below:
The Clonex Corporation
Testing Department (2nd Dept.)
Cost of Production Report
For the Month of January, 19        
Quantity Schedule:    
Units received from the preceding department   45,000
======
Units transferred to next department 40,000  
Units still in process (1/2 labor and FOH) 3,000  
Units lost in process 2,000 45,000
======
Cost Charged To the Department: Total
Cost
unit
Cost
 
Cost from preceding department:
Transferred in during the month $77,400
--------
$1.72
-------
Cost added by the department:
Labor 37,310 0.87
Factory Overhead (FOH) 32,800
-------
0.76
-----
Total cost added $70,110 $1.63

------- ------
Total cost to be accounted for $147,510 $3.35

====== ======
Cost Accounted for as Follows:    
Transferred to next department [(40,000 × $3.51+$0.167)]*   $140,720
Work in process - ending inventory:

From preceding department (3,000 × $1.72) $5,160
Labor (3,000 × 1/3 × $0.87) 870
Factory Overhead (3,000 × 1/2 × $0.76) 760
------
6,790
------
Total cost accounted for
$147,510


======

Additional Computations:
Equivalent Production:
Labor and factory overhead = 40,000 + 3,000 / 3 + 2,000 lost units = 41,000 units
Unit Costs:
Labor = $37,310 / 43,000 = $0.87 per unit
Factory overhead = $32,800 / 43,000 = $0.76 per unit
Lost unit cost = $3.35 × 2,000 units = $6,700 + 40,000 units $0.1675 per unit to be added to $3.35 to make the transfer cost $3.5175.
*40,000 units  $3.5175 = $140,700. To avoid a decimal discrepancy, the cost transferred is computed: $147,510 - $6,790 = $140,720.
A comparison of the differences between the two cost of production reports for the testing departments as to amounts for costs of units transferred and work in process inventory is shown below the production report. Not the offsetting increases and decreases.
In this illustration, the assumption has been made that the lost units, identified at the end of the process, were complete as to all costs. In sum companies, members of the quality control or inspection departments make production checks prior to the end of the process. Such a procedure uncovers lost units that are not complete when the loss is incurred or the spoilage discovered and yet the loss may pertain only to units completed and not to units still in process. In such a case the lost units should be adjusted for their equivalent stage of completion. For example, 2,000 units lost at the 90% stage of conversion would appear as 1,800 equivalent units with regard to labor and factory overhead costs.

Normal Vs Abnormal Loss of units:

Units are lost through evaporation, shrinkage, substandard yields, spoiled work, poor work man ship, or inefficient equipment. In many instances the nature of operations makes certain losses normal or unavoidable, because they are considered with in normal tolerance limits for human and machine errors. The cost of these normally lost units does not appear as a separate item of cost but is spread over the remaining good units.
A different situation is created by abnormal or avoidable spoilage or losses that are not expected to arise under normal, efficient operating conditions. The cost of such abnormal spoilage or losses is charged either to factory overhead as shown below, thereby appearing as an additional unfavorable able factory overhead variance, or directly to a current period expense account and reported as a separate item in the cost of goods sold statement.
 Factory Overhead Control                              6,700
       Work in process - Testing Department                      6,700
                             (lost units)

The cost of production report would show the abnormal spoilage or loss as follows:
Transferred to next department (40,000 units × $3.35) ..............$134,020*
Transferred to factory overhead [40,000 units  × $0.1675) or
 (2,000 lost units × $3.35)].......................................................6,700

*40,000 units × $3.35 = $134,000. To avoid decimal discrepancy, the cost transferred is computed: $147,510 - $6,790 ending inventory - $6,700 = $134,020
If the lost units were only partially complete, equivalent production calculations should consider their stage of completion when lost or spoiled, and the costing of the abnormal loss should be weighted accordingly. If one part of the loss is normal and another abnormal, each portion must be treated in accordance with the above discussion. The critical factor in distinguishing between normal and abnormal spoilage or loss is the degree of controllability. Normal or unavoidable spoilage or loss is produced by the process under efficient operating conditions, referred to as uncontrollable. Abnormal or avoidable spoilage or loss is considered unnecessary, because the conditions resulting in the loss are controllable. For this reason, within the limits set by the state of the art of production, the difference is a short-run condition; in the long run, management should adjust and control all factors of production and eliminate all abnormal conditions.
The cost of production report at the beginning of this page shows a total cost of $147,510 to be accounted for by the Testing department. The department completed and transferred 40,000 units to the Terminal Department (third or final department) at a cost of $140,000 (40,000 × $3.51). The remaining cost is assigned to the work in process inventory. This balance is broken down by the various costs in process. When computing the cost of the ending work in process inventory of any department subsequent to the first, costs received from the preceding departments must be included.
The 3,000 units still in process, completed by the Blending Department (first department) at a unit cost of $1.72, were later adjusted by $0.08 (to $1.80) because of the loss of some of the units transferred. Therefore, the Blending Department's (first department) cost of the 3,000 units still in process is $5,400 figure is not broken down further , since such information is not pertinent to the Testing Department's operations. However, the amount is listed separately in the cost of production report, because it is part of the Testing Department's ending work in process inventory.
Materials (if any), labor, and factory overhead (FOH) added by a department are costed separately in order to arrive at total work in process (WIP). In the testing department, no materials were added to the units received; thus, the ending inventory shows no materials in the process. However, labor and factory overhead costs were incurred. The work in process analysis stated that labor and factory overhead used on the units in process were sufficient to complete 1,000 units. The cost of labor in process is $910 (1,000 × $0.91) and factory overhead is process is $800 (1,000 × $0.80). The total cost of the 3,000 units in process is $7,110 ($5,400 + $910 + $800). This cost, added to that transferred to the Terminal Department (third or final department), $140,400, accounts for the total cost of $147,510 charged to the Testing Department.