Tool Catalogue

Quality & Continuous Improvement

Test whether a gauge reads high or low against a reference: bias, its confidence interval, a t-test for significance, and bias as a share of tolerance. Refuses to conclude from too few readings. Runs entirely in your browser. Nothing is uploaded.

Quality & Continuous Improvement

Plot single measurements as an I-MR control chart: control limits from the moving range, four run rules, and capability against your specification. Refuses to draw limits from too little data. Runs entirely in your browser. Nothing is uploaded.

Quality & Continuous Improvement

Plot an X-bar and R control chart from measured subgroups: centre lines, control limits from the standard A2, D3, D4 and d2 constants, out-of-control points and runs of seven, with the process sigma estimated from the average range. Type the readings in or import a spreadsheet. Nothing is uploaded.

Quality & Continuous Improvement

Enter your measured readings and a specification, and get the whole capability picture: mean, sigma, Cp, Cpk, Cpu, Cpl, Pp, Ppk, an estimated defect rate in parts per million, a histogram against the limits and a run chart that shows the drift an average hides. Type the readings in or import a sprea

Quality & Continuous Improvement

Run a measurement system analysis by the average and range method: type in every part, appraiser and trial reading and see repeatability, reproducibility, %GRR against study variation and tolerance, and the number of distinct categories your gauge can actually resolve. Type the readings in or import

Quality & Continuous Improvement

Run 5 Why root cause analyses: state the problem, walk the why chain, name the root cause, then track the countermeasure through to verified. Runs entirely in your browser — nothing is uploaded.