Spare Parts Management

For maintenance organizations, spare availability directly affects downtime and MTTR. Buffa and Chase style planning frameworks emphasize criticality-based inventory segmentation.

Relation 1 —

Write this relation with symbols exactly as in Maintenance Engineering — SRK Rao before substituting numbers. Examiners award partial marks for a correct setup even when arithmetic slips.

Relation 2 —

Write this relation with symbols exactly as in Maintenance Engineering — SRK Rao before substituting numbers. Examiners award partial marks for a correct setup even when arithmetic slips.

Relation 3 —

Write this relation with symbols exactly as in Maintenance Engineering — SRK Rao before substituting numbers. Examiners award partial marks for a correct setup even when arithmetic slips.

Fast movers may follow standard EOQ/ROP logic, while critical low-demand spares require service-level and risk-based stocking. ABC and VED analyses are commonly combined in Indian plant practice. Groover links spares policies with manufacturing uptime reliability.

State assumptions explicitly before using any relation for spare parts management — steady state, uniform properties, linear elastic material, ideal gas, incompressible flow, etc., as applicable.

Wrong assumptions invalidate the entire solution even when the formula is correct. In Maintenance Management viva and GATE descriptive questions, listing valid assumptions often earns separate marks.

1. Read the question and list given data with SI units (common in Maintenance Management papers).
2. Draw a neat labelled diagram where applicable — examiners in Indian universities award diagram marks even when arithmetic slips.
3. Identify which relation from this topic applies to spare parts management.
4. Use equation 1: .
5. Use equation 2: .
6. Substitute values, compute, and verify units and sign (direction).
7. State conclusion in one line — e.g. safe/unsafe, stable/unstable, feasible/infeasible.

Spare Parts Management appears in plant reliability teams. In Indian industrial curricula this topic is tested because it connects theory to RCM and spare parts strategy.

GATE and semester exams often combine spare parts management with earlier units — revise prerequisites before attempting mixed problems.

Industry interview panels sometimes ask: "Where did you use spare parts management?" — answer with a lab, mini-project, or plant visit example if possible.

Students often stock by annual usage only and ignore criticality. Another common error is setting one service level for all spare classes.

Before attempting spare parts management problems, confirm you can:

1. Slow movers vs critical spares stocking
2. Obsolescence risk for long-life equipment
3. Kitting reduces repair time

Revise the solved examples in Maintenance Engineering — SRK Rao and one previous-year GATE or university paper for this unit.