Useful by default.
Quality, compliance, and operations writing for tier-2 manufacturers. The kind of article you finish, then send to a colleague.
- June 1, 2026 · Opwise
Cpk vs. Ppk: What the Difference Actually Means on the Shop Floor
Cpk and Ppk look almost identical on a capability report, but they answer different questions. Here's what each index actually measures, when to use which one, and why a gap between them is the most useful signal your process data can give you.
- May 23, 2026 · Opwise
In-Process Inspection: How to Trigger It, Track It, and Close It Without Losing the Thread
Most in-process inspection programs fail in one of three places: no one knows when to trigger an inspection, the right procedure doesn't follow the event, or the finding never gets formally closed. Here's how to fix all three.
- May 22, 2026 · Opwise
How to Set Up a Layered Process Audit Program That People Actually Complete
Most LPA programs collapse within six months — not from bad intent, but from structural problems that are easy to fix. Here's how to build one that holds.
- May 19, 2026 · Opwise
Which SPC Control Chart Should You Use? A Practical Decision Guide
Xbar-R, Individuals/MR, p, np, run chart, histogram — each one answers a different question. Here's how to pick the right chart for your data, your process, and your subgroup size.
- May 18, 2026 · Opwise
What Are Western Electric Rules — and Which Ones Should You Actually Enable?
The four Western Electric rules catch process shifts your control limits miss. But running all four on every characteristic creates noise. Here's how to decide which rules to turn on — and when.
- May 15, 2026 · Opwise
How to Write a Nonconformance Report That Actually Holds Up
A step-by-step guide to writing nonconformance reports (NCRs) that satisfy ISO 13485, 21 CFR Part 820, and ISO 9001 auditors — and actually help you fix the problem.