ABC Analysis

Value-based inventory classification using annual consumption value.

Definition

Value-based inventory classification using annual consumption value. This reference is designed for practical industrial stores, MRO, production and materials-management environments.

Objective

Prioritize management attention using annual consumption value, not unit price alone.

Scope

Apply the method at item, category, location or plant level as appropriate. The control should connect planning, purchasing, stores transactions, physical verification and management review.

Required Inputs

  • Item code
  • annual quantity
  • unit rate
  • annual consumption value.

Methodology

  1. Define the business requirement, scope and review period.
  2. Validate item master, consumption, stock and open transaction data.
  3. Calculate or classify using the defined method.
  4. Compare the result with criticality, supplier constraints and future demand.
  5. Assign an action owner, due date and review frequency.
  6. Monitor KPI movement and revise parameters when conditions change.

Formula / Control Logic

Annual Consumption Value = Annual Quantity × Unit Rate. Rank descending and calculate cumulative percentage.

Worked Industrial Example

If annual quantity is 1,200 units at ₹250, annual value is ₹300,000. Classification boundaries should be defined by the organization and reviewed against the actual value curve.

Decision Rules

  • Use value ranking for attention, not as the only stock policy.
  • Combine ABC with criticality and movement before changing service levels.
  • Review classifications periodically as prices and consumption change.

Industrial Controls

  • Authorized master-data and parameter changes
  • ERP transaction discipline and document traceability
  • Physical verification and reconciliation
  • Exception reporting with named ownership
  • Periodic management review of ageing, service and capital exposure

KPIs

Service

Availability, fill rate and stock-out performance.

Accuracy

Book-to-physical reliability and transaction quality.

Capital

Turnover, coverage, ageing, excess and dead stock.

Common Errors

  • Using one universal 80/15/5 rule without examining the actual curve.
  • Classifying only by unit rate.
  • Ignoring criticality of low-value spares.

Excel / MIS Application

Useful fields: Item Code, Description, UOM, Opening Qty, Receipt Qty, Issue Qty, Closing Qty, Unit Rate, Annual Consumption, Current Stock, Open PO, Lead Time, Safety Stock, ROP, Min, Max, ROQ, ABC, VED, FSN, Ageing, Action.

Management Review Questions

  • Which items require action now, and why?
  • Are open orders aligned with actual requirement?
  • Which exceptions are recurring and what is the root cause?
  • Which parameter should be changed, and what evidence supports the change?

Related Inventory References

Professional practice: A calculation is a control aid, not a substitute for engineering judgement, approved policy, physical verification or business-risk assessment.