Comprehensive Notes on Process Costing Principles

Process Costing Overview

• Uses of Process Cost Systems:

  • Designed for applying costs to similar products produced in mass/continuous fashion.

  • Examples: Cereal, paint, steel, oil refining, soft drinks (Jones Soda, ExxonMobil, etc.).

• Comparison to Job Order Cost Systems:

  • Job Order Cost: Used for unique products. Costs assigned per job (e.g., movies, advertisements).

  • Process Cost: Costs tracked through manufacturing processes/departments for uniform products in large volume.

• Characteristics of Process Cost System:

  • Production is continuous until finished product emerges.

  • Homogeneous products with equal amounts of materials, labor, and overhead.

• Service Companies:

  • Benefit from a job order cost system for individualized, nonroutine services.

  • Process cost systems are better for routine, repetitive services.

Flow of Costs in a Process Cost System

• Cost Assignment:

  • Direct materials, labor, and manufacturing overhead similar to job order systems.

  • Journal Entries

  • Debit Raw Materials Inventory for materials purchased.

  • Debit Factory Labor and Manufacturing Overhead for incurred costs.

• Material Cost Assignment:

  • Fewer requisition slips compared to job order systems, as requisitions are for large quantities used in processes.

• Example of Cost Assignment Journal Entries:

  • Direct Materials:

  • Work in Process—Machining 50,000

  • Work in Process—Assembly 20,000

  • Raw Materials Inventory 70,000

  • Direct Labor:

  • Work in Process—Machining 20,000

  • Work in Process—Assembly 13,000

  • Factory Labor 33,000

  • Manufacturing Overhead:

  • Work in Process—Machining 45,000

  • Work in Process—Assembly 17,000

  • Manufacturing Overhead 62,000

Equivalent Units of Production

• jComputing Equivalent Units:

  • Use when products are partially completed.

  • E.g., calculating per student cost involves considering various states of completion.

• Weighted-Average Method:

  • Accounts for degree of completion (weighting) and includes both completed and work in process units.

• Illustration of Computation:

  • E.g., if 4,000 units in work in process at 60% completion for materials, equivalent units = 4,000 x 60% = 2,400.

• Example Calculation for a Department:

  • Completed units = 0

  • Work-in-process equivalent = 2,400 equivalent units total.

Production Cost Report Steps

1. Compute Physical Unit Flow:

   • Total units = Started into production + Beginning work in process.

   • Total accounted for = Transferred out + Ending work in process.

2. Compute Equivalent Units of Production:

   • Total for materials and conversion costs separately.

3. Compute Unit Production Costs:

   • Calculate costs based on equivalent units.

4. Prepare a Cost Reconciliation Schedule:

   • Ensure totals match cost assignments.

• Example Production Cost Report:

  • Key metrics include unit costs for materials and conversion, total costs accounted for, etc.

Final Comments on Costing Systems

• Many companies may use a hybrid system combining process and job order costing, known as operations costing.

• This approach accommodates individual product features while utilizing standardized methods.