Bài giảng Managerial Accounting - Chapter 3: Process Cost Accounting

John Wiley & Sons, Inc.Prepared byKarleen Nordquist..The College of St. Benedict... and St. John’s University....Managerial Accounting Weygandt, Kieso, & KimmelChapter 3Process Cost AccountingAfter studying this chapter, you should be able to:1 Understand who uses process systems.2 Explain the similarities and differences between job order cost and process cost systems.3 Explain the flow of costs in a process cost system.4 Make the journal entries to assign manufacturing costs in a process cost system.Chapter 3Process Cost AccountingAfter studying this chapter, you should be able to:5 Compute equivalent units.6 Explain the four steps necessary to prepare a production cost report.7 Prepare a production cost report.Chapter 3Process Cost AccountingPreview of Chapter 3Nature of Process Cost SystemsUsesSimilarities and DifferencesProcess Cost FlowAssignment of Manufacturing CostsEquivalent UnitsWeighted-Average MethodRefinementsProduction Cost ReportPROCESS COST ACCOUNTINGPreview of Chapter 3Comprehensive Example of Process CostingPhysical UnitsEquivalent Units of ProductionUnit Production CostsCost Reconciliation ScheduleProduction Cost ReportPROCESS COST ACCOUNTINGUnderstand who uses process systems.Study Objective 1The Nature ofProcess Cost SystemsProcess cost systems are used to apply costs to similar products that are mass-produced in a continuous fashion. In a process costing environment, finished units are normally indistinguishable from each other.Explain the similarities and differences between job order cost and process cost systems.Study Objective 2Job Order versus Process Cost SystemsIn a job order cost system, costs are assigned to each job. In a process cost system, costs are tracked through a series of connected manufacturing processes or departments, rather than by individual jobs. Thus, process cost systems are used when a large volume of uniform, or relatively homogeneous, products are produced. Job Order Cost and Process Cost FlowDirect MaterialsDirect LaborManufacturing OverheadCost of Goods SoldFinished Goods InventoryWork in Process InventoryJob 101Job 102Job 103Job Order Cost FlowDirect MaterialsDirect LaborManufacturing OverheadWork in Process - Department AWork in Process - Department BFinished Goods InventoryCost of Goods SoldProcess Cost FlowIllustration 3-3Job Order versus Process Cost Systems: SimilaritiesThe manufacturing cost elements: Both systems track Direct Materials, Direct Labor, and Manufacturing Overhead.The accumulation of the costs: Both systems accumulate costs by debiting Raw Materials Inventory, Factory Labor, and Manufacturing Overhead.The flow of costs: Both systems assign costs to Work in Process, Finished Goods, and Cost of Goods Sold. The method of assigning costs differs significantly, however.Job Order versus Process Cost Systems: DifferencesThe number of work in process accounts used: A job order cost system uses only one work in process account. Process cost systems use a separate work in process account for each production department or manufacturing process.Documents used to track costs: In a job order cost system, costs are charged to individual jobs and summarized on a job cost sheet. In a process cost system, costs are summarized in a production cost report for each department.Job Order versus Process Cost Systems: DifferencesThe point at which costs are totaled: In job order cost system, total costs are determined when the job is completed. In a process cost system, total costs are determined at the end of a period of time, such as a month or year.Unit cost computations: In a job order cost system, the unit cost is the total cost per job divided by the units produced. In a process cost system, the unit cost is total manufacturing costs for the period divided by the units produced during the period.Job Order versus Process Cost Systems: SummaryFeaturesWork in process accountsDocuments usedDetermination of total manufacturing costsUnit-cost computationsProcess Cost SystemOne for each processProduction cost reportsEach periodTotal manufacturing costs  Units produced during the periodJob Order Cost SystemOne for multiple jobsJob cost sheetsEach jobCosts of each job  Units produced for the jobIllustration 3-4Explain the flow of costs in a process cost system.Study Objective 3Process Cost FlowManufacturing CostsRaw MaterialsFactory LaborManufacturing Overheadassigned toWork in Process Production Department ACosts transferred out toFinished Goods InventoryCost of Goods SoldWork in Process Production Department BCost of completed workCost of Goods SoldIllustration 3-5Process Cost FlowTyler Company uses a process cost system to account for its manufacture of automatic can openers. Manufacturing consists of two processes: Machining and Assembly. Materials, labor, and manufacturing overhead can be added in both departments. When the Machining Department finishes its work, the partially completed units are transferred to the Assembly Department. In the Assembly Department, the goods are finished and are then transferred to Finished Goods. Upon sale, the goods are removed from Finished Goods and become Cost of Goods Sold.Make the journal entries to assign manufacturing costs in a process cost system.Study Objective 4Assignment of Manufacturing CostsAs indicated earlier, the accumulation of the costs of materials, labor, and manufacturing overhead is the same in a process cost system as in a job order cost system. All raw materials are debited to Raw Materials when purchased. All factory labor is debited to Factory Labor when the labor costs are incurred. Overhead costs are debited to Manufacturing Overhead as they are incurred. However, the assignment of the three cost elements to Work in Process in a process cost system is different from a job order system.In a process cost system, fewer materials requisition slips are usually required than in a job order cost system, since materials are used for processes rather than for specific jobs.Materials are usually added to production at the beginning of the first process. However, in subsequent processes, other materials may be added at various points.At Tyler Company, materials are added at the beginning of each process. The entry to record the materials used is:Work in Process - MachiningWork in Process - Assembly Raw Materials Inventory (To record materials used)XXXXXXXXXXXXAssignment of Manufacturing Costs: Journal EntriesIn process costing, as in job order costing, time tickets may be used to determine the cost of labor assignable to the production departments. Since labor costs are assigned to a process rather than a job, the labor cost chargeable to a process can alternatively be obtained from the payroll register or departmental payroll summaries.The entry to assign labor costs for Tyler is:Work in Process - MachiningWork in Process - Assembly Factory Labor (To assign factory labor to production)XXXXXXXXXXXXAssignment of Manufacturing Costs: Journal EntriesThe objective in assigning overhead in a process cost system is to allocate the overhead costs to the production departments on an objective and equitable basis. That basis is the activity that “drives” or causes the costs. A primary driver of overhead costs in continuous manufacturing operations is machine time used, not direct labor. Thus machine hours are widely used in allocating manufacturing overhead costs.The entry to allocate overhead to Tyler’s processes is:Work in Process - MachiningWork in Process - Assembly Manufacturing Overhead (To assign overhead to production)XXXXXXXXXXXXAssignment of Manufacturing Costs: Journal EntriesAt the end of the month, entries are needed to record the cost of the goods transferred from one processing department to the next, the cost of goods transferred from the last processing department to Finished Goods Inventory, and the costs of goods transferred from Finished Goods Inventory to Cost of Goods Sold.Assignment of Manufacturing CostsWork in Process - Assembly Work in Process - Machining (To record transfer of units to Assembly Department)XXXXXXXXThese entries for Tyler Company are as follows:Finished Goods Inventory Work in Process - Assembly (To record transfer of units to Finished Goods)XXXXXXXXCost of Goods Sold Finished Goods Inventory (To record cost of units sold)XXXXXXXXAssignment of Manufacturing Costs: Journal EntriesCompute equivalent units.Study Objective 5Equivalent Units of ProductionEquivalent units of production measure the work done during the period, expressed in fully completed units. This concept is used to determine the cost per unit of completed product.Equivalent Units of ProductionThere are two methods of computing equivalent units. The weighted-average method is the method most widely used in practice and will be discussed next.The FIFO method is less frequently used and is discussed in advanced cost accounting classes.Weighted-average MethodThe weighted-average method considers the degree of completion (weighting) of the units completed and transferred out and the ending work in process.The formula to compute equivalent units of production is:Units Completed and Transferred OutEquivalent Units of Ending Work in ProcessEquivalent Units of Production+=Illustration 3-8Weighted-average Method: ExamplesTo better understand this concept of equivalent units, consider the following two examples:Example 1: The Blending Department’s entire output during the period consists of ending work in process of 4,000 units which are 60% complete as to materials, labor, and overhead.The equivalent units of production for the Blending Department are therefore 2,400 units (4,000 X 60%).Example 2: The Packaging Department’s output during the period consists of 10,000 units completed and transferred out, and 5,000 units in ending work in process which are 70% completed. The equivalent units of production for the Packaging Department are therefore 13,500 [10,000 + (5,000 X 70%)].Refinements on the Weighted-average MethodWhen materials are not added evenly throughout the processing (such as when all materials are added at the beginning of a process), Work in Process at the end of the period will have different completion percentages for materials and conversion costs (labor and overhead). Two equivalent unit computations will then be needed.Refinements on the Weighted-average MethodThe earlier formula used to compute equivalent units of production can be refined to show the computations for materials and conversion costs, as follows:Units Completed and Transferred Out - MaterialsEquivalent Units of Ending Work in Process - MaterialsEquivalent Units of Production - Materials+=Units Completed and Transferred Out - Conversion CostsEquivalent Units of Ending Work in Process - Conversion CostsEquivalent Units of Production - Conversion Costs+=Illustration 3-11Refined Weighted-average Method: ExampleTo better understand this refined concept of equivalent units, consider the following example:Kellogg Company makes Eggo® Waffles. Three departments are used to produce these waffles: Mixing, Baking, and Freezing & Packaging. The following information relates to the Mixing Department.Illustration 3-9Work in process, June 1Started into production Total unitsUnits transferred outWork in process, June 30 Total unitsPhysical Units100,000800,000900,000700,000200,000900,000Materials100%100%Conversion Costs70%60%Percentage CompleteRefined Weighted-average Method: ExampleThe previous slide indicates that the beginning work in process is 100% complete as to material cost and 70% complete as to conversion costs. In other words, all of the materials are added at the beginning of the process, while the conversion costs are incurred uniformly throughout the process and are 70% complete at the end of the period. The units transferred out to the Baking Department are fully complete as to both materials and conversion costs.The ending work in process is fully complete as to materials, but only 60% complete as to conversion costs.Refined Weighted-average Method: ExampleTwo equivalent unit computations are therefore necessary: one for materials and the other for conversion costs. These computations are shown below:Units transferred outWork in process, June 30 200,000 X 100% 200,000 X 60%Total equivalent unitsMaterials700,000200,000900,000Conversion Costs700,000120,000820,000Equivalent UnitsNotice that in computing equivalent units, the beginning work in process is not part of the formula.Illustration 3-10Explain the four steps necessary to prepare a production cost report.Study Objective 6Production Cost ReportA production cost report is the key document used by management to understand the activities in a department because it shows the production quantity and cost data related to that department.For example, in producing Eggo® Waffles, Kellogg Company would have three production cost reports: Mixing, Baking, and Freezing & Packaging.Production Cost ReportIn order to be ready to complete a production cost report, the company must perform four steps: 1 Compute the physical unit flow. 2 Compute the equivalent units of production. 3 Compute unit production costs. 4 Prepare a cost reconciliation schedule.As a whole, these four steps make up the process costing system.Comprehensive Example of Process CostingThe next slides will present an extended example of the process costing system.Comprehensive Example of Process CostingAssumed data for the Mixing Department at Kellogg Company for the month of June are shown on the next slide. We will use this information to complete a production cost report.Comprehensive Example of Process Costing: DataIllustration 3-13Units:Work in process, June 1 Direct materials: 100% complete Conversion costs: 70% completeUnits started into production during JuneUnits completed and transferred out to BakingWork in process, June 30 Direct materials: 100% complete Conversion costs: 60% completeCosts:Work in process, June 1 Direct materials: 100% complete Conversion costs: 70% completeCost of work in process, June 1Costs incurred during production in June Direct materials Conversion costsCosts incurred in June100,000800,000700,000200,000$ 50,00035,000$ 85,000$400,000170,000$570,000Mixing DepartmentCompute the Physical Unit Flow (Step 1)Physical units are the actual units to be accounted for during a period, irrespective of any work performed. Add the units started into production during the period to the units in process at the beginning of the period. This amount is referred to as the total units to be accounted for.These units are then accounted for by the output of the period, which consists of units transferred out during the period, and any units in process at the end of the period. This amount is referred to as the total units accounted for.Compute the Physical Unit Flow (Step 1)The flow of physical units for Kellogg Company for the month of June in the Mixing Department are shown below:Illustration 3-14Units to be accounted for Work in process, June 1 Started (transferred) into production Total unitsUnits accounted for Completed and transferred out  Work in process, June 30 Total unitsPhysical Units100,000800,000900,000700,000200,000900,000Mixing DepartmentCompute Equivalent Units (Step 2)Once the physical flow of the units is established, it is necessary to measure the Mixing Department’s productivity in terms of equivalent units of production. In the Mixing Department, materials are added at the beginning of the process. Thus, two computations of equivalent units are required: one for materials and one for conversion costs.The equivalent unit computation is as follows:(Remember that beginning work in process is ignored in this computation.)Compute Equivalent Units (Step 2)Illustration 3-15Units transferred outWork in process, June 30 200,000 X 100% 200,000 X 60%Total equivalent unitsMaterials700,000200,000900,000Conversion Costs700,000120,000820,000Equivalent UnitsCompute Unit Production Costs (Step 3)Armed with the knowledge of the equivalent units of production, we can now compute the unit production costs. Unit production costs are costs expressed in terms of equivalent units of production. When equivalent units of production are different for materials and conversion costs, three unit costs are computed: (1) materials, (2) conversion, and (3) total manufacturing.The computation of total materials cost related to Eggo® Waffles is as follows:Illustrations 3-16 & 17Work in process, June 1 Direct materials costsCosts added to production during June Direct materials costsTotal materials costs$ 50,000400,000$450,000Compute Unit Production Costs (Step 3)The computation of unit materials cost is as follows:Total Materials CostEquivalent Units of MaterialsUnit Materials Cost=$450,000900,000$.50=The computation of total conversion costs is as follows:Illustrations 3-18 & 19Work in process, June 1 Conversion costsCosts added to production during June Conversion costsTotal conversion costs$ 35,000170,000$205,000Compute Unit Production Costs (Step 3)The computation of unit conversion cost is as follows:Total Conversion CostEquivalent Units of Conversion CostsUnit Conversion Cost=$205,000820,000$.25=Total manufacturing cost per unit is therefore computed as follows:Illustration 3-20Compute Unit Production Costs (Step 3)Unit Materials CostUnit Conversion CostsTotal Manufacturing Cost per Unit+=$.50.25$.75+=Prepare a Cost Reconciliation Schedule (Step 4)We are now ready to determine the cost of goods transferred out of the Mixing Department to the Baking Department and the costs in ending work in process. The total costs that were charged to the Mixing Department in June are as follows:Costs to be accounted for Work in process, June 1 Started into productionTotal costs$ 85,000570,000$655,000Illustration 3-21The total costs charged to the Mixing Department in June are therefore $655,000. A cost reconciliation schedule is then prepared to assign these costs to (1) units transferred out to the Baking Department and (2) ending work in process.Illustration 3-22Prepare a Cost Reconciliation Schedule (Step 4)Costs accounted for Transferred out (700,000 x $.75) Work in process, June 30 Materials (200,000 x $.50) Conversion costs (120,000 x $.25)Total costsMixing DepartmentCost Reconciliation Schedule$100,00030,000$525,000130,000$655,000Prepare a Cost Reconciliation Schedule (Step 4)The total manufacturing cost per unit of $.75 is used in costing the units completed and transferred to the Baking Department.In contrast, the unit cost of materials and the unit cost of conversion are needed in costing units in process.The cost reconciliation schedule shows that the total costs accounted for equal the total costs to be accounted for.Prepare a production cost report.Study Objective 7Preparing the Production Cost ReportAt this point, we are ready to prepare the production cost report for the Mixing Department. As indicated earlier, this report is an internal document for management that shows production quantity and cost data for a production department.The production cost report for the Mixing Department is shown on the next two slides. The four steps in preparing the report are highlighted.Production Cost ReportMixing DepartmentProduction Cost ReportFor the Month Ended June 30, 1999Illustration 3-23aQUANTITIESUnits to be accounted for Work in process, June 1 Started into productionTotal unitsUnits accounted for Transferred out Work in process, June 30Total UnitsMaterials700,000200,000900,000Conversion Costs700,000120,000820,000Equivalent UnitsStep 2Physical UnitsStep 1100,000800,000900,000700,000200,000900,000Mixing DepartmentProduction Cost ReportFor the Month Ended June 30, 1999Illustration 3-23bCOSTSUnits costs Step 3 Costs in June Equivalent units Unit costs (a