AKUNTANSI MANAJEMEN LANJUTAN PENENTUAN HARGA POKOK PRODUK DAN PEMBUATAN KEPUTUSAN DALAM LINGKUNGAN PEMANUFAKTURAN MAJU rowland.pasaribu@gmail.c PERTEMUAN II, 28 OKTOBER 2013 • ACTIVITY BASED COSTING • ACTIVITY BASED MANAGEMENT • INVENTORY MANAGEMENT Learning Objective 1 Describe the purposes of cost management systems. 4-3 Cost Management System A cost-management system (CMS) is a collection of tools and techniques that identifies how management’s decisions affect costs. 4-4 What is Cost Accounting? Cost accounting is that part of the accounting system that measures costs for the purposes of management decision making and financial reporting. 4-5 Learning Objective 2 Explain the relationships among cost, cost objective, cost accumulation, and cost allocation. 4-6 Cost Accounting System Cost Accumulation Collecting costs by some “natural” classification such as materials or labor Cost Allocation Tracing costs to one or more cost objectives 4-7 Cost Accounting System RAW MATERIAL COSTS (METALS Cost Accumulation Cost Allocation to Cost Objects: 1. Departments 2. Activities MACHINING DEPARTMENT FINISHING DEPARTMENT ACTIVITY ACTIVITY ACTIVITY ACTIVITY CABINETS 3. Products CABINETS DESKS DESKS TABLES 4-8 TABLES Cost • A cost may be defined as a sacrifice or giving up of resources for a particular purpose. • Costs are frequently measured by the monetary units that must be paid for goods and services. 4-9 Cost Objective What is a cost object or cost objective? It is anything for which a separate measurement of costs is desired. 4 - 10 Learning Objective 3 Distinguish among direct, indirect, and unallocated costs. 4 - 11 Direct Costs What are direct costs? Direct costs can be identified specifically and exclusively with a given cost objective in an economically feasible way. 4 - 12 Indirect Costs What are indirect costs? Indirect costs cannot be identified specifically and exclusively with a given cost objective in an economically feasible way. 4 - 13 What Distinguishes Direct and Indirect Costs? • Managers prefer to classify costs as direct rather than indirect whenever it is “economically feasible” or “cost effective.” • Other factors also influence whether a cost is considered direct or indirect. • The key is the particular cost objective. 4 - 14 Categories of Manufacturing Costs Any raw material, labor, or other input used by any organization could, in theory, be identified as a direct or indirect cost depending on the cost objective. 4 - 15 Categories of Manufacturing Costs • All costs which are eventually allocated products are classified as either… 1 direct materials, 2 direct labor, or 3 indirect manufacturing. 4 - 16 to Direct Material Costs... – include the acquisition costs of all materials that are physically identified as a part of the manufactured goods and that may be traced to the manufactured goods in an economically feasible way. 4 - 17 Direct Labor Costs... – include the wages of all labor that can be traced specifically and exclusively to the manufactured goods in an economically feasible way. 4 - 18 Indirect Manufacturing Costs... – or factory overhead, include all costs associated with the manufacturing process that cannot be traced to the manufactured goods in an economically feasible way. 4 - 19 Product Costs... – are costs identified with goods produced or purchased for resale. • Product costs are initially identified as part of the inventory on hand. • These costs, inventoriable costs, become expenses (in the form of cost of goods sold) only when the inventory is sold. 4 - 20 Period Costs... – are costs that are deducted as expenses during the current period without going through an inventory stage. 4 - 21 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Period or Product Costs • In merchandising accounting, insurance, depreciation, and wages are period costs (expenses of the current period). • In manufacturing accounting, many of these items are related to production activities and thus, as indirect manufacturing, are product costs. 4 - 22 Period Costs – Merchandising and Manufacturing • In both merchandising and manufacturing accounting, selling and general administrative costs are period costs. 4 - 23 Learning Objective 4 Explain how the financial statements of merchandisers and manufacturers differ because of the types of goods they sell. 4 - 24 Financial Statement Presentation – Merchandising Companies Income Statement Sales Balance Sheet – Merchandise Inventory Expiration Cost of Goods Sold (an expense) Equals Gross Margin – Period Costs Selling and Administrative Expenses Equals Operating Income 4 - 25 Financial Statement Presentation – Manufacturing Companies Income Statement Sales Balance Sheet Direct Material Inventory – Expiration Cost of Goods Sold (an expense) Equals Gross Margin – Work-inProcess Inventory Finished Goods Inventory Period Costs Selling and Administrative Expenses Equals Operating Income 4 - 26 Costs and Income Statements • On income statements, the detailed reporting of selling and administrative expenses is typically the same for manufacturing and merchandising organizations, but the cost of goods sold is different. 4 - 27 Cost of Goods Sold for a Manufacturer • The manufacturer’s cost of goods produced and then sold is usually composed of the three major categories of cost: 1 Direct materials 2 Direct labor 3 Indirect manufacturing 4 - 28 Cost of Goods Sold for a Retailer or Wholesaler • The merchandiser’s cost of goods sold is usually composed of the purchase cost of items, including freight-in, that are acquired and then resold. 4 - 29 Learning Objective 5 Understand the main differences between traditional and activity-based costing systems and why ABC systems provide value to managers. 4 - 30 Traditional Cost System Direct Material Resource Direct Labor Resource Direct Trace Direct Trace Products 4 - 31 All Indirect Resources All Unallocated Value Chain Costs Cost Driver Unallocated Two-Stage Activity-Based Cost System Direct Material Resource Direct Labor Resource Direct Trace Direct Trace Other Direct Resources % % Indirect Resource Z % All Unallocated Value Chain Costs % Activity Activity 1 10 Cost Cost Driver Driver Products 4 - 32 Indirect Resource A Unallocated Activity-Based Costing Understanding the relationships among activities, resources, costs, and cost drivers is the key to understanding ABC and how ABC facilitates managers’ understanding of operations. 4 - 33 Activity-Based Costing Example of Activities and Cost Drivers: Activities: Account billing Bill verification Account iniquity Correspondence 4 - 34 Cost Drivers: No. of lines No. of accounts No. of labor hours No. of letters Learning Objective 6 Identify the steps involved in the design and implementation of an activity-based costing system. 4 - 35 Designing and Implementing an Activity-Based Costing System Step 1 Determine cost of activities, resources, and related cost drivers. 4 - 36 Step 2 Develop a process-based map representing the flow of activities, resources, and their interrelationships. Designing and Implementing an Activity-Based Costing System Step 3 Collect relevant data concerning costs and the physical flow of the cost-driver units among resources and activities. 4 - 37 Designing and Implementing an Activity-Based Costing System Step 4 Calculate and interpret the new activity-based information. Using an activity-based costing system to improve the operations of an organization is activity-based management (ABM). 4 - 38 Activity-Based Management Activity-based management aims to improve the value received by customers and to improve profits by identifying opportunities for improvements in strategy and operations. 4 - 39 Activity-Based Management • A value-added cost is the cost of an activity that cannot be eliminated without affecting a product’s value to the customer. • In contrast, non-value-added costs are costs that can be eliminated without affecting a product’s value to the customer. 4 - 40 Learning Objective 7 Use activity-based cost information to improve the operations of an organization. 4 - 41 Using ABC Information Activity-based management… provides costs of value-added and non-value-added activities. improves managers’ understanding of operations. 4 - 42 Learning Objective 8 Understand cost accounting’s role in a company’s improvement efforts across the value chain. 4 - 43 Cost Accounting and the Value Chain A good cost accounting system is critical to all value-chain functions from research and development through customer service. 4 - 44 Activity Based Management Activity-Based Management (ABM) •Activity-based management (ABM) is a systemwide, integrated approach that focuses management’s attention on activities with the objective of improving customer value and the profit achieved by providing this value. –Activity-based management encompasses both product costing and process value analysis. Activity-Based Management Model Cost Dimension Resources Process Dimension Driver Analysis Why? Activities What? Products and Customers Performance Measures How Well? Process Value Analysis •Process value analysis is fundamental to activity-based responsibility accounting, focuses on accountability for activities rather than costs, and emphasizes the maximization of systemwide performance instead of individual performance. – Process value analysis is concerned with: • Driver analysis • Activity analysis • Performance measurement Activity Analysis •Activity analysis should produce four outcomes: •What activities are performed? •How many people perform the activities? •The time and resources required to perform the activities. •An assessment of the value of the activities to the organization, including a recommendation to select and keep only those that add value. Value-Added Activities •A discretionary activity is classified as valueadded provided it simultaneously satisfies three conditions: –The activity produces a change of state. –The change of state was not achievable by preceding activities. –The activity enables other activities to be performed. Nonvalue-Added Activities Nonvalue-Added Activities are activities that add cost and impede performance. Examples • • • • • Scheduling Moving Waiting Inspecting Storing Activity Analysis Activity Analysis Can Reduce Costs in Four Ways: • • • • Activity elimination Activity selection Activity reduction Activity sharing Activity Performance Measurement Three Dimensions of Activity Performance Efficiency Quality Time Measures of Activity Performance •Financial measures of activity efficiency include: –Value and nonvalueadded activity cost reports –Trends in activity cost reports –Kaizen standard setting –Benchmarking INVENTORY MANAGEMENT Economic Order Quantity, JIT, and the Theory of Contraints 55 Learning Objectives • Describe the traditional inventory management model. • Describe JIT inventory management. • Explain the basic concepts of constrained optimization. • Describe the theory of constraints, and explain how it can be used to manage inventory. 56 Inventory, thousands of bricks Managing Inventories 57 Inventory 60 Average Inventory 30 0 3 6 Weeks 9 12 The Appropriate Inventory Policy Two Basic Questions Must be Addressed How much should be ordered or produced? When should the order be placed or the setup be performed? 58 Inventories • As the firm increases its order size, the number of orders falls and therefore the order costs decline. However, an increase in order size also increases the average amount in inventory, so that the carrying cost of inventory rises. The trick is to strike a balance between these two costs. 59 Basics of Traditional Inventory Management Inventory Costs • Ordering or Setup Costs • Carrying Costs • Stockout Costs 60 Inventory Costs 1. Ordering Costs: The costs of placing and receiving an order Examples: clerical costs, documents, insurance for shipment, and unloading. 2. Carrying Costs: The costs of carrying inventory Examples: insurance, inventory taxes, obsolescence, opportunity cost of capital tied up in inventory, and storage. 61 Inventory Costs (continued) 3. Stock-Out Costs: The costs of not having sufficient inventory Examples: lost sales, costs of expediting (extra setup, transportation, etc.) and the costs of interrupted production. 4. Setup Costs: The costs of preparing equipment and facilities so they can be used to produce a particular product or component Examples: setup labor, lost income (from idled facilities), and test runs. When a firm produces the goods internally, ordering costs are replaced by setup costs. 62 Traditional Reasons for Carrying Inventory 1. To balance ordering or setup costs and carrying costs 2. To satisfy customer demand (e.g., meet delivery dates) 3. To avoid shutting down manufacturing facilities because of: a. machine failure b. defective parts c. unavailable parts d. late delivery of parts 63 Traditional Reasons for Carrying Inventory (continued) 4. Unreliable production processes 5. To take advantage of discounts 6. To hedge against future price increases 64 Inventories Determination of optimal order size Inventory costs, dollars Total costs Carrying costs Total order costs Optimal order size 65 Order size An Inventory Model Total Costs = Ordering costs + Carrying cost TC = PD/Q + CQ/2 whereTC = The total ordering (or setup) and carrying cost P = The cost of placing and receiving an order (or the cost of setting up a production run) Q = The number of units ordered each time an order is placed (or the lot size for production) D = The known annual demand C = The cost of carrying one unit of stock for one year Economic order quantity (EOQ) = 2PD/C 66 Inventories Economic Order Quantity - Order size that minimizes total inventory costs. Economic Order Quantity = 67 2 x annual sales x cost per order carrying cost Economic-Order-Quantity Decision Model The formula for the EOQ model is: EOQ = 2 DP C D = Demand in units for a specified time period P = Relevant ordering costs per purchase order C = Relevant carrying costs of one unit in stock for the time period used for D 68 An EOQ Illustration EOQ = 2PD/C D = 1,000 units Q = 500 units P = $200 per order C = $40 per unit EOQ = (2 x 200 x 10,000) / 40 EOQ = 10,000 EOQ = 100 units 69 Economic-Order-Quantity Decision Model • What are the relevant total costs? • The formula for relevant total costs (RTC) is: RTC = Annual relevant ordering costs + Annual relevant carrying costs RTC = ( ) D ×P+ Q ( ) Q ×C= 2 DP + Q QC 2 • Q can be any order quantity, not just EOQ. 70 Relevant Total Costs (Dollars) 10,000 Economic-Order-Quantity Decision Model 8,000 Annual relevant total costs 6,000 5,434 Annual relevant ordering costs 4,000 2,000 Annual relevant carrying costs 71 Order Quantity (Units) 600 988 1,200 EOQ 1,800 2,400 Considerations in Obtaining Estimates of Relevant Costs • Obtaining accurate estimates of the cost parameters used in the EOQ decision model is a challenging task. • What are the relevant incremental costs of carrying inventory? – Only those costs of the purchasing company that change with the quantity of inventory held 72 Considerations in Obtaining Estimates of Relevant Costs • What is the relevant opportunity cost of capital? – It is the return forgone by investing capital in inventory rather than elsewhere. – It is calculated as the required rate of return multiplied by those costs per unit that vary with the number of units purchased and that are incurred at the time the units are received. 73 Costs Associated with Goods for Sale • Five categories of costs associated with goods for sale are: 1. Purchasing costs 2. Ordering costs 3. Carrying costs 4. Stockout costs 5. Quality costs 74 Reorder Point When Demand is Certain Reorder point = Rate of usage x Lead time Example: Assume that the average rate of usage is 4 units per day for a component. Assume also that the time required to place and receive an order is 10 days. What is the reorder point? Reorder point = 4 x 10 = 40 units Thus, an order should be placed when inventory drops to 40 units. 75 Reorder Point When Demand is Uncertain Reorder point = (Ave. rate of usage x Lead time) + Safety stock where: Safety stock = (Maximum usage - Average usage) x Lead time 76 Reorder Point (continued) Example: Suppose that the maximum usage is 6 units per day and the average usage is 4 units per day. The lead time is 10 days. What is the reorder point? Safety stock Reorder point 77 = (6 - 4) x 10 = 20 units = (4 x 10) + 20 = 60 units Reorder Point 988 Reorder Point Reorder Point 494 Weeks 1 2 3 Lead Time 2 weeks 78 4 5 6 7 8 Reorder Point (no safety stock) Reorder point = Rate of usage x Lead time 100 80 ROP 60 40 20 0 Time 79 Safety Stock • Safety stock is inventory held at all times regardless of the quantity of inventory ordered using the EOQ model. • Safety stock is used as a buffer against unexpected increases in demand or lead time and unavailability of stock from suppliers. 80 Evaluating Managers and GoalCongruence Issues • Goal-congruence issues can arise when there is an inconsistency between the EOQ decision model and the model used to evaluate the performance of the manager implementing the inventory management decisions. 81 Traditional versus JIT Inventory Procedures Inventory Control System Traditional Systems 1. 2. 3. 4. 5. Balance setup and carrying costs Satisfy customer demand Avoid manufacturing shutdowns Take advantage of discounts Hedge against future price increases JIT Systems 1. Drive setup and carrying costs to zero 2. Use due-date performance *3. Total preventive maintenance *4. Total quality control *5. The Kanban system *Rather than holding inventories as a hedge against plant-shutdowns, JIT attacks the plant-shutdown problem by addressing these issues. 82 Just-In-Time Production Systems • Just-in-time (JIT) production systems take a “demand pull” approach in which goods are only manufactured to satisfy customer orders. • Demand triggers each step of the production process, starting with customer demand for a finished product at the end of the process, to the demand for direct materials at the beginning of the process. 83 Materials Requirement Planning (MRP) • Materials requirements planning (MRP) systems take a “push-through” approach that manufactures finished goods for inventory on the basis of demand forecasts. • MRP predetermines the necessary outputs at each stage of production. • Inventory management is a key challenge in an MRP system. 84 JIT And Inventory Management Setup and Carrying Costs: The JIT Approach • JIT reduces the costs of acquiring inventory to insignificant levels by: 1. Drastically reducing setup time 2. Using long-term contracts for outside purchases • Carrying costs are reduced to insignificant levels by reducing inventories to insignificant levels 85 JIT And Inventory Management Due-Date Performance: The JIT Solution • Lead times are reduced so that the company can meet requested delivery dates and to respond quickly to customer demand. • Lead times are reduced by: – reducing setup times – improving quality – using cellular manufacturing 86 JIT And Inventory Management Avoidance of Shutdown: The JIT Approach • Total preventive maintenance to reduce machine failures • Total quality control to reduce defective parts • Cultivation of supplier relationships to ensure availability of quality raw materials and subassemblies • The use of the Kanban system is also essential 87 JIT And Inventory Management Discounts and Price Increases: JIT Purchasing Versus Holding Inventories • Careful vendor selection • Long-term contracts with vendors – Prices are stipulated (usually producing a significant savings) – Quality is stipulated – The number of orders placed are reduced 88 Major Features of a JIT System The five major features of a JIT system are: • Organizing production in manufacturing cells • Hiring and retaining multi-skilled workers • Emphasizing total quality management • Reducing manufacturing lead time and setup Time • Building strong supplier relationships 89 Benefits of JIT Systems • Benefits of JIT production: – Lower carrying costs of inventory – Eliminating the root causes of rework, scrap, waste, and manufacturing lead time. 90 Performance Measures and Control in JIT Production • To manage and reduce inventories, the management accountant must design performance measures to control and evaluate JIT production. • What information may management accountants use? – Personal observation by production line workers and managers – Financial performance measures, such as inventory turnover ratios 91 Performance Measures and Control in JIT Production • What are nonfinancial performance measures of time, inventory, and quality? – Manufacturing lead time – Units produced per hour – Days’ inventory on hand – Total setup time for machines/Total manufacturing time – Number of units requiring rework or scrap/Total number of units started and completed 92 Backflush Costing • A unique production system such as JIT often leads to its own unique costing system. • Organizing manufacturing in cells, reducing defects and manufacturing lead time, and ensuring timely delivery of materials enables purchasing, production, and sales to occur in quick succession with minimal inventories. 93 Backflush Costing • Where journal entries for one or more stages in the cycle are omitted, the journal entries for a subsequent stage use normal or standard costs to work backward to flush out the costs in the cycle for which journal entries were not made. 94 Trigger Points • Stage A: Purchase of direct materials • Stage B: Production resulting in work in process • Stage C: Completion of a good finished unit or product • Stage D: Sale of finished goods 95 Trigger Points • Assume trigger points A, C, and D. • This company would have two inventory accounts: • 96 Type Combined materials and materials in work-inprocess inventory Account Title 1. Inventory: Material and In-Process Control 2. Finished goods Finished Goods Control Trigger Points • Assume trigger points A and D. • This company would have one inventory account: • Type Account Title Combines direct materials Inventory inventory and any direct Control materials in work-in-process and finished goods inventories 97 Special Considerations in Backflush Costing • Backflush costing does not necessarily comply with GAAP – However, inventory levels may be immaterial, negating the necessity for compliance • Backflush costing does not leave a good audit trail – the ability of the accounting system to pinpoint the uses of resources at each step of the production process 98 What is the Kanban System? A Card System is used to monitor work-inprocess • A withdrawal Kanban • A production Kanban • A vendor Kanban 99 The Withdrawal Kanban Item No. TVD-114 Item Name LCD Screen Preceding Process Computer Assembly Computer Type Compaq 4/25 Box Capacity 12 Box Type AD-1942 100 Subsequent Process Final Assembly The Production Kanban Item No. TVD-114 Item Name LCD Screen Computer Type Compaq 4/25 Box Capacity 12 Box Type ___AD-1942 101 Process Computer Assembly The Vendor Kanban Item No. TVD-114 Item Name Computer Chassis Name of Receiving Company Type Black Plastic Box Capacity 12 Box Type Cardboard--Type Time to Deliver Receiving Gate North Receiving Gate 8:30 A.M., 12:30 P.M., 2:30 P.M. Name of Vendor Hovey Supply Company 102 The Kanban Process (7) Withdrawal Store Lot with P-Kanban LCD Assembly (5) Attach W-Kanban (6) Signal Remove (4) P-Kanban Attach to Post Production Ordering Post 103 LCD Screen Withdrawal (1) (1) Remove W-Kanban Attach to Post (2), (3) Withdrawal Post Final Assembly Multiple Constrained Resource To the Thurman Company example for a one constrained resource, add the following additional constraint: the market limits sales of the economy disk player to 3,000 units. Formulate the linear programming problem and solve using the graphical method Let X1 = deluxe models and X2 = economy models Formulation: Max CM = 40X1 + 25X2 Subject to: 4X + 2X2 < 20,000 X2 < 3,000 104 Multiple Constrained Resource (continued) X 2 10,000 4X 1 +2X 2< 20,000 3,000 D C X 2< 3,000 B A 105 5,000 X 1 Multiple Constrained Resource (continued) Corner Point X1 X2 CM = 40X1 + 25X2 A 0 0 0 B 5,000 0 $200,000 C* 3,500 3,000 $215,000 D 0 3,000 $75,000 * Point C is optimal The X1 value of point c is found by substituting the second equation into the first one like so: $X1 + 2 (3,000) = 20,000 4X1 + 6,000 = 20,000 4X1 =14,000 X1 = 3,500 106 Theory of Constraints Three Measures of Systems Performance • Throughput • Inventory • Operating expenses 107 The Theory of Constraints (continued) Five steps to improve performance: 1. Identify an organization’s constraints. 2. Exploit the binding constraints. 3. Subordinate everything else to the decisions made in Step 2. 4. Elevate the organization’s binding constraints. 5. Repeat the process as a new constraint emerges to limit output. 108 Theory of Constraints A sequential process of identifying and removing constraints in a system. Restrictions or barriers that impede progress toward an objective 109 Theory of Constraints • The theory of constraints emphasizes the management of bottlenecks as the key to improving the performance of the production system as a whole. 110 Methods to Relieve Bottlenecks • Eliminate idle time at the bottleneck operation • Process only those parts or products that increase throughput contribution, not parts or products that will remain in finished goods or spare parts inventories • Shift products that do not have to be made on the bottleneck operation to nonbottleneck processes, or to outside processing facilities 111 Methods to Relieve Bottlenecks • Reduce setup time and processing time at bottleneck operations • Improve the quality of parts or products manufactured at the bottleneck operation 112 Theory of Constraints • The objective of TOC is to increase throughput contribution while decreasing investments and operating costs. • TOC considers a short-run time horizon and assumes operating costs to be fixed costs. 113 The Drum-Buffer-Rope System Raw Materials Initial Process Rope Process A Final Process Process B Finished Goods Time Buffer Drummer Process 114 Process C The Management of Capacity • Managers can reduce capacity-based fixed costs by measuring and managing unused capacity • Unused Capacity is the amount of productive capacity available over and above the productive capacity employed to meet consumer demand in the current period 115 Analysis of Unused Capacity • Two Important Features: 1. Engineered Costs result from a cause-and-effect relationship between output and the resources used to produce that output 2. Discretionary Costs have two parts: 116 1. They arise from periodic (annual) decisions regarding the maximum amount to be incurred 2. They have no measurable cause-and-effect relationship between output and resources used Managing Unused Capacity • Downsizing (Rightsizing) is an integrated approach of configuring processes, products, and people to match costs to the activities that need to be performed to operate effectively and efficiently in the present and future • Because identifying unused capacity for discretionary costs is difficult, downsizing, or otherwise managing this unused capacity, is also difficult. 117 End of Week 118