Job Costing and Product Costing Systems

Definition of Product Costing: Product costing is the structured process of assigning both direct and indirect costs to specific products or services.
- Direct Costs: These are costs that can be specifically traced to a particular cost object (such as a specific product or service).
- Indirect Costs: These are costs that cannot be traced to a single cost object and must instead be allocated based on a specific method.

When developing a comprehensive product-costing system, firms must make three critical methodological choices:

Cost Accumulation Method: The fundamental way costs are collected. Choices include:
- Job Costing: Costs are assigned to unique jobs or batches.
- Process Costing: Costs are assigned to continuous processes or stages of production.
Cost Measurement Method: The manner in which the cost values themselves are determined. Choices include:
- Actual Costing: Uses the historical, actual costs incurred.
- Normal Costing: Uses actual direct materials and direct labor costs, but applies factory overhead using a predetermined rate.
- Standard Costing: Uses budgeted or target costs for all components (materials, labor, and overhead).
Overhead Assignment Method: The logic used to distribute indirect costs. Choices include:
- Volume-based Allocation: Distribution based on a single metric like direct labor hours or machine hours.
- Activity-based Costing (ABC): Distribution based on multiple cost drivers related to specific activities.
- Departmental Allocation: Uses different rates for different departments within the facility.
Example of a Hybrid System: A firm might choose to integrate multiple methods simultaneously, such as a system utilizing job costing, normal costing, and activity-based costing.

Job Costing:
- Costs are "traced" and "allocated" to each individual job as resources are consumed.
- Each job is treated as a separate, distinct unit of output.
- Ideal for costs identified with specific customers, projects, or contracts.
- Characterized by units or batches (jobs) that are distinct from one another.
- Typically involves units of relatively high value or units that are priced differently.
- Requires complex record-keeping to maintain distinct cost records for every single job.
Process Costing:
- Costs are "traced" and "allocated" to each process or department as resources are consumed.
- While each process is different, the units produced within a specific process are treated as identical (homogeneous).
- Units of output are indistinguishable from one another.
- Typically involves units of relatively low value or units that are priced exactly the same.
- It is considered too costly to track the specific cost of each individual unit separately.

Job Costing Industries:
- Construction
- Printing
- Special equipment manufacturing
- Shipbuilding
- Medical services
- Custom furniture manufacturers
- Advertising agencies
- Accounting firms
Process Costing Industries:
- Chemical industry
- Bottling companies
- Plastics manufacturing
- Food products
- Paper products
- Cement manufacturing
- Brick production

Core Function: Job Costing accumulates costs and assigns them to specific jobs, customers, projects, clients, or contracts.
The Job-Cost Sheet: This is the basic supporting document in a job costing system.
- It records and summarizes the specific costs of direct materials, direct labor, and factory overhead for a unique job.
- The document is officially started the moment the production or processing of a specific job begins.

Identify the specific cost objects (the jobs).
Trace the direct product costs associated with each cost object.
Assign the indirect product costs to each cost object using an allocation method.
Combine the direct and indirect product costs to determine the total cost for each object.
Normal Costing Adjustment: If normal costing is employed, product costs must be adjusted at the end of the period for any over-applied or under-applied indirect costs.

Dept A (6/6 to 6/25): Tickets A-1101 through A-1150; $100$ Hours @ $\$10.00/hr$ ; Amount: $\$1,000.00$
Dept B (6/26 to 6/30): Tickets B-308 through B-320; $60$ Hours @ $\$15.00/hr$ ; Amount: $\$900.00$
Dept C (7/1 to 7/15): Tickets C-515 through C-500; $140$ Hours @ $\$12.00/hr$ ; Amount: $\$1,680.00$
Total Direct Labor: $\$3,580.00$