Comparisons
Written to be useful when we are the wrong answer, because you will find out either way and it is cheaper for both of us if it happens now.
A Minitab alternative for small factories
Minitab is the better statistics package. For a plant that needs live control charts on the shop floor rather than a study on an engineer's laptop, it is usually the wrong tool. An honest comparison.
Read →SPC charts without Excel
Excel can draw a control chart. What it cannot do is keep the limits still, tell you when a rule trips, or survive the person who built it leaving. Here is what actually breaks.
Read →X̄-R chart in Google Sheets vs SPC Visuals
How to build a correct X̄-R chart in Google Sheets, including the formulas and the A2 constant — and the three things it still will not do.
Read →SPC software for a single production line
Most SPC software is sold to plants with fifty lines and priced accordingly. What a single line actually needs, and what it should cost.
Read →Free SPC software — what you actually give up
There is genuinely good free SPC software. An honest look at what each option costs you in time, risk or capability, from someone who sells the paid kind.
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