Electrical Spare Parts Criticality Analyzer
Score a spare part by the consequence of failure, the equipment it supports, the time required to replace it and how difficult it is to source. The result creates a transparent priority ranking for maintenance inventory decisions.
Score a spare part
Priority result
Scoring method
This analyzer uses four independent 1-to-5 factors: equipment criticality, failure impact, replacement lead time and supply availability difficulty. Each factor is normalized to a 100-point scale and weighted. Criticality receives the percentage entered by the user; the remaining weight is divided equally among the other three factors.
Priority score = Criticality × Wc + Impact × Wi + Lead time × Wl + Availability × Wa
Each factor is first converted from 1–5 to 0–100 using (value − 1) ÷ 4 × 100. The weighting is a decision framework, not an industry-mandated formula.
Why this is useful
Spare inventories often become large because every item is treated equally. A structured score makes it easier to explain why one spare deserves earlier procurement or a higher service level than another.
Do not confuse criticality with failure probability
A part can have a low failure rate but still deserve high priority if its failure would stop a critical operation and the replacement lead time is long. Conversely, a frequently replaced item may not need a large strategic stock if it is cheap and immediately available.
FAQs
Are the 1–5 scores standardized?
No. They are deliberately configurable planning scales. Document how your organization defines each score so that different analysts produce consistent results.
Why include availability difficulty?
Two parts with the same technical criticality can deserve different inventory priorities when one can be sourced locally and the other takes months.
What does the weighting do?
It determines how much influence equipment criticality has relative to the other factors.
Does installed quantity affect the score?
The installed quantity is shown as planning context but is not automatically mixed into the score because quantity and criticality answer different questions.