Electrical Supplier Lead-Time Comparator
Compare supplier timing against the date a material must be on site. Add an explicit schedule buffer and a reliability allowance so a quoted lead time is not treated as a guaranteed delivery date.
Compare supplier timing
Lead-time comparison
| Supplier | Quoted | Buffer | Reliability allowance | Modeled duration | Margin vs required | Status |
|---|
Methodology
The comparator turns a supplier's quoted lead time into a planning duration by adding the entered buffer and an uncertainty allowance. The uncertainty allowance is modeled as a percentage of quoted lead time; this is an explicit planning assumption rather than a statement about any supplier's actual performance.
Modeled duration = Quoted lead time + Buffer + (Quoted lead time × Reliability allowance %)
Positive margin means the modeled duration fits inside the available schedule. Negative margin means the modeled duration exceeds the available schedule.
Why quote and risk should be separated
A supplier can have the shortest advertised lead time yet leave little schedule margin. Conversely, a slightly longer quoted lead time can be safer if it has a more credible buffer and fits comfortably ahead of the required-on-site date.
Limits
- This tool does not create a guaranteed delivery date.
- Reliability assumptions should come from your own vendor history, contract terms or project controls.
- Customs, inspection, transport and site receiving delays may require their own explicitly modeled allowance.
- Supplier ranking here is only about timing, not commercial cost or technical quality.
FAQs
What is the buffer for?
It represents time deliberately held between an expected supplier event and the date you actually need the material.
Why use a percentage reliability allowance?
It provides a simple uncertainty model when a project has limited historical data. It should be replaced by better evidence when available.
Can a supplier with a longer quote still win?
Yes. The ranking is based on modeled schedule risk, so the supplier with the best margin can be preferred even if its headline quote is not the shortest.
Does this replace expediting?
No. It is an early comparison tool that helps identify which purchase deserves closer schedule attention.