Incomplete CAD and unclear specifications: how they slow down production
Incomplete data is one of the biggest causes of delay in manufacturing. Here’s what goes wrong, and what to ask for before quoting.
Any manufacturer will recognise this scenario. A project arrives with a CAD file and a request for a quote. On closer inspection, features are missing, dimensions conflict, materials aren’t specified, and nobody has said how tight the tolerances need to be.
The manufacturer now has a choice: guess, or go back with questions. Both cost time.
What happens when data is incomplete
- Quotes are unreliable. Assumptions are built in, and they may prove wrong. The price moves later.
- Back-and-forth slows everything down. Each round of questions can take days, especially across time zones.
- Tooling risk increases. If the design changes after tooling has started, modifications or re-cuts are expensive.
- Quality is harder to control. Without agreed specifications, there’s no clear standard to measure against, and disagreements over “what was wanted” are likely.
- Relationships suffer. Delays and disputes damage trust between the manufacturer and the customer.
What to look for before you quote
- Full 3D models and 2D drawings that match each other
- Tolerances and critical dimensions marked
- Materials, finishes and colours specified
- Any standards, tests or certifications that apply
- An assembly structure and bill of materials
- Expected volumes and target price
How to handle it
Many manufacturers build checklists for new enquiries so gaps are identified early. That’s a good start. Another option is to involve a party who understands both design and production, and who can close the gaps before the data reaches you.
That is a role we play. We work with customers to complete and clarify the data so it’s ready for production, meaning you receive information you can quote against with confidence.
If you’re regularly receiving designs that aren’t quite there, we’d like to hear about it. Discuss a manufacturing challenge with us.