Which parts of your project deserve a site visit?

A single fabricated part can hold up an entire assembly. Its purchase price might be modest, but the cost of it arriving late can be substantial.

That creates an interesting question for engineering businesses: how much confidence should you have in a supplier’s delivery date, and what should you do to weight that level of confidence?

An email saying “we’re on track” is useful. But it leaves quite a lot unanswered. Has fabrication started? Are the materials available? Is there a technical query holding things up? Has another customer’s urgent job quietly jumped the queue?

For a routine part with plenty of time and several alternatives, an email update may be enough. For a critical fabrication with no easy replacement, a more informed conversation makes sense. For something that could stop the project, regular visits may be justified.

There’s a progression here:

A visit can feel like a vote of no confidence. It also takes people away from their work, and there may be legitimate concerns about confidentiality or access.

Agreeing milestones, evidence and appropriate visits when placing the order helps set expectations. Explain why the part matters to the wider project. Keep visits focused, respect the supplier’s time and ask what support would help.

Where access is difficult, dated progress photographs, inspection records or a video walkthrough may provide useful evidence. A reluctance to host a visit doesn’t automatically mean something is wrong.

You want suppliers to tell you about a problem while there is still time to help and how you respond to bad news will influence how quickly you hear it next time.

A slipping delivery might be recovered by resolving a drawing query, speeding up an approval, helping source material or agreeing additional capacity. In some cases, providing suitably qualified staff or arranging specialist support could help.

You may be able to accept a partial delivery or re-sequence assembly around the delay. Moving work to another supplier is another option, but transferring tooling, knowledge and quality requirements can take time. It can create a bigger delay if left too late.

The earlier you understand the problem, the more realistic those choices become.

And the risk keeps moving.

Last week’s biggest concern may now be ready for dispatch. A straightforward part may have become critical following a design change, failed inspection or slipped production slot.

Regular project reviews should reassess where attention is needed. Which parts could now delay an assembly? What evidence supports the latest dates? What can we do to improve the outcome, and who owns that action?

A useful system makes those answers visible. A green status needs a reason behind it.

Which delivery dates on your current projects are supported by evidence, and which are still running on optimism?