Summary of Management Accounting Principles and Methods
Management Accounting Principles and Methods Explained
Introduction
Cost accounting methods and classification explain how businesses record, analyse and assign costs so managers can make better decisions about pricing, production, and control. This material breaks the topic into clear parts, with definitions, examples, and practical guidance for a not-attending student.
Definition: Monetary value of resources (inputs) consumed to achieve a goal (produce output). Costs include all expenses of acquiring and producing resources; cost is not the same as expense.
1. Purpose of Cost Analysis
- Supports pricing strategy, budgeting and planning
- Identifies profitable and unprofitable areas for optimisation
- Improves decision-making and competitive advantage
2. Cost Objects and Tracing
What is a cost object?
- A cost object is anything for which cost data are desired (product, customer, department). It must be measurable and causally related to the cost to be traceable.
Definition: Cost object — anything for which cost data are collected (e.g., a product, service, project).
Direct vs Indirect costs
- Direct costs: Easily traced to a cost object (e.g., wood for a chair).
- Indirect costs (Overheads): Not easily traced; allocated using cost drivers (e.g., rent, factory utilities).
Definition: Common cost — an indirect cost that supports multiple cost objects and cannot be traced to any single one.
3. Cost Classifications for Manufacturing Companies
- Direct material — becomes part of the product and is traceable
- Direct labour — labour traceable to products
- Other direct costs — specific services or human inputs directly attributable
- Manufacturing overhead — all other factory costs (fuel, depreciation, property tax)
- Non-manufacturing costs — selling, general & administrative (SG&A)
Example: In a furniture factory, wood = direct material, assembly wages = direct labour, factory heating = manufacturing overhead, sales commissions = selling expense.
4. Product vs Period Costs (Financial Statement Classification)
- Product (inventoriable) costs: Direct materials + Direct labour + Manufacturing overhead. These costs are capitalised as inventory on the balance sheet and expensed as COGS when sold.
- Period costs: Selling and administrative expenses; expensed in the period incurred under accrual accounting.
Definition: Conversion cost = Direct labour + Manufacturing overhead. Prime cost = Direct materials + Direct labour.
Table: Product vs Period costs
| Feature | Product costs | Period costs |
|---|---|---|
| Included items | Direct materials, direct labour, manufacturing overhead | Selling & administrative expenses |
| Financial reporting | Inventoried until sold (BS) | Expensed on IS when incurred |
5. Cost Behaviour: Fixed, Variable, Mixed
- Variable costs (VC): Change with activity; constant per unit (e.g., direct materials, piece-rate labour).
- Fixed costs (FC): Do not change with activity within the relevant range (e.g., rent, depreciation).
- Mixed (semi-variable) costs: Have fixed and variable elements (e.g., phone service with base fee + usage charges).
Definition: Relevant range — the activity range over which the assumed cost behaviour (fixed or variable) holds true.
Mathematical relation (linear within relevant range):
$$Y = a + bX$$
where $Y$ = total cost, $a$ = total fixed cost, $b$ = variable cost per unit, $X$ = activity volume.
Examples of fixed cost types:
- Committed FC: Long-term, hard-to-change (facility investments, long-term leases).
- Discretionary FC: Short-term, managerial choice (advertising, training).
6. Analyzing Mixed Costs
Four methods to split mixed costs into fix
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Cost Accounting Overview
Klíčová slova: Managerial Accounting, Workplace Motivation, Cost Accounting Methods & Classification, Costing Methods & Reporting, Segment Reporting, Budgeting, Financial Accounting, Make-or-Buy
Klíčové pojmy: Cost is monetary value of inputs consumed, not identical to expense, Direct costs are traceable; indirect costs (overheads) require allocation, Product costs = DM + DL + MOH; Period costs = selling + admin, Cost behaviour within relevant range: $Y = a + bX$ where $a$ is fixed, $b$ is variable per unit, Mixed costs can be split using account analysis, engineering, high-low, or regression, POR = budgeted overhead ÷ budgeted activity; choose drivers carefully, Job-order costing for custom jobs; process costing for continuous, identical products, Traditional IS groups product vs period costs; contribution IS groups variable vs fixed costs, Differential cost = difference between alternatives; ignore sunk costs; include opportunity costs, Variable costing charges only variable manufacturing costs to product; fixed MOH is period cost, High-low example: $b = \frac{\Delta cost}{\Delta activity}$ then $a = TC - bX$, Segmented contribution statements show segment CM and traceable fixed costs