COST ASSIGNMENT METHODS: JOB COSTING
COST ASSIGNMENT METHODS: JOB COSTING
OVERVIEW
Introduction to Job Order Costing
Job-order costing is identified as one of the simplest cost assignment systems.
This method focuses on tracing and assigning costs directly to identifiable batches or lots of cost objects.
Contrast with process costing, which traces and associates costs according to processes rather than products.
Both methodologies aim to gather costs and divide them among a set of goods under production.
Job-order costing simplifies bookkeeping aspects related to inventory accounts, mimicking the physical flow of goods in manufacturing.
This approach is relevant for various types of services, not just manufacturing.
The document compares different overhead costing methods: actual, normal, and standard.
Applications of Job-Order Costing
Job-order costing is developed for:
Custom production environments
Job-shop production
Batch production
Process costing is suited for continuous, uniform products.
Job-order costing groups costs by production batches, which can vary by customer, specification, or convenience.
Example: Computer diskette manufacturing may employ both job-order and process costing.
Job-order costing is mandatory when products vary significantly, typical in custom manufacturing like construction or certain service industries.
It can apply universally across diverse manufacturing and service situations.
PRODUCTION ACTIVITY AND JOB-ORDER COSTING
Job-order costing involves production batches:
Batches can consist of 1 to many product units.
Batches may vary due to customer needs, specifications, seasonal demands, or production logic.
Production Examples
Example of mixed-costing environments:
Computer diskette manufacturers using both job-order costing (for assembly) and process costing (for internal components).
Job-order costing suits unique products and services like construction projects or bespoke service jobs (e.g., legal services, software installation).
Aircraft assembly and book printing serve as further job-order costing examples.
FLOW OF COSTS THROUGH INVENTORIES
Cost accounting systems record production costs as assets pre-sale.
Three basic inventory classifications:
Raw Materials Inventory: Costs associated with purchased materials pre-production.
Work-in-Process Inventory (WIP): Adjusted costs as goods progress through production.
Finished Goods Inventory: Costs exiting WIP, aligned with the physical goods process.
JOB-ORDER COSTING PROCESS
Cost accumulation process documents production costs:
Costs associated with individual batches are gathered and assigned via WIP accounts.
Job-order costing compiles direct material and labor costs by batch, allocating overhead costs based on established procedures.
Materials and Labor Cost Tracking
Job Cost Sheet:
Records costs of materials withdrawn from raw materials for job use.
Reflects costs debited to the job's work-in-process (WIP) account and credited to the raw materials inventory.
While traditional sheets may be digital today, the concept remains a ledger for inventory tracking.
Costs are updated as materials and labor are used, requiring accurate job-related activity records.
Overhead Cost Assignment
Overhead cost determination:
An allocation measure tied to job costs (e.g., direct labor hours).
The overhead rate is calculated based on a period's total overhead costs divided by the chosen allocation basis.
CALCULATING OVERHEAD COSTS
Overhead Calculation Steps:
Calculate Overhead Rate (OHr):
Calculate Overhead Assigned:
Example using direct labor hours as allocation basis.
Example: Framingham Framis Company
Context of production for job 930503:
Total direct material issued: 5,000 pounds of resin (value: $11,200).
Direct labor: 4,200 hours (cost: $49,000).
Total prime costs: $60,200 (direct material + direct labor).
Actual overhead applied after final calculations:
Total direct labor hours for the month: 16,800 hours.
Overhead calculation based on using a percentage of total labor hours for job completion.
Total cost determined:
Sum of direct material, labor, and calculated overhead.
APPROACHES TO OVERHEAD COSTING
Actual Costing: Costs are computed post-job completion using recorded overhead.
Normal Costing: Overhead is calculated based on estimates prior to actual job costs being realized:
Example parameters used for estimates in Framingham Framis include total manufacturing overhead and annual labor hour estimates.
Predetermined overhead rate formulation:
Overhead assigned under normal costing allows quicker job costing without waiting on final overhead documentation.
PRACTICAL EXAMPLES OF JOB COSTING
Analyzing January orders at Light-Pro Custom Replacement Window factory:
Specific job data including direct materials, direct labor hours, and intended calculations by either costing method.
Costs computed using both actual and normal costing methods differ only in overhead rates.
Usage of machine hours compared to direct labor hours may yield varying cost outputs, determined by the selected allocation basis.
PROBLEMS AND SOLUTIONS IN JOB COSTING
Problem Scenarios:
Jobs with actual versus normal costing comparison challenge the understanding of overhead application and efficiency reporting.
Financial Implications: Overapplied or underapplied overhead may indicate discrepancies between estimated and actual performance metrics, not efficiency directly.
Conclusion
Job-order costing provides a simplistic yet effective means to track production costs by gathering pertinent data leading up to a unit’s production completion.
Differences in accounting outcomes shine light on various costing methodologies employed depending on corporate needs or managerial decisions regarding budgeting and forecasting.
-Customary variations may not reflect genuine mismanagement but instead may pinpoint inaccuracies in overhead estimations or allocation methods.
Summary of Key Points
Job-order costing focuses on gathering costs related directly to specific job outputs.
Accounting treatment of overhead and consistent methodology application maintains integrity across financial reporting, ensuring accurate representation of production expenses for defined job activities.