Practical guides for precision manufacturing
Field-tested explanations of the concepts that show up in every quote, every route, and every post-calculation review. Written for the estimators, work-preparers, and manufacturing engineers who actually do the work.
Pre-calculation vs post-calculation: what each one can tell you
Pre-calculation and post-calculation answer two different questions — what should this cost, and what did this actually cost — and neither one is useful in isolation. Post-calculation without a pre-calculation to check against has nothing to measure. Pre-calculation without post-calculation never gets more accurate. This guide sets out what each step actually does, and why the comparison between them, not either number alone, is what an estimator can act on.
Cycle time, setup time and programming time: what is the difference?
"How long does this part take to make" sounds like a single question with a single answer. In practice, a manufacturing company tracks at least three distinct time components separately: setup time, programming time, and cycle time. Collapsing them into one generic "production time" number hides exactly the information that matters for pricing and planning correctly, especially because the relative weight of each one changes depending on whether the job is a one-off or a large series.
Why STEP and the drawing still belong together
A STEP file and a 2D drawing are often treated as if one should make the other unnecessary. In practice they carry different kinds of information, and whether a specific STEP file makes the drawing redundant depends entirely on what the exporting system actually put into it — not on the fact that it is STEP. This guide sets out what each format reliably carries, where the confusion causes real quoting mistakes, and how Model-Based Definition changes the question without settling it automatically.