Step 4 · 5 min read
Toolkit & calculator
The Toolkit tab is your shortcut to every analytical tool LeanProjax ships with — all 34 tools, grouped by DMAIC phase, plus a 12-mode calculator for quick math. You can open any of them from any project — the tool remembers the project context, so its outputs feed straight back into the Executive summary and the Full report / PDF.
How it works
One hub, one editor, one autosave.
Every tool has the same shape. A hub lists every run of that tool across your workspace; an editor opens when you click in. You don’t save — changes autosave as you make them, so closing the tab loses nothing. Every run belongs to a project and is included in the Full report / PDF and shown on the Executive summary until you switch it off — two switches in the editor, one per surface.
- 1KPI strip — tools used, runs in flight, runs created, and how many are in the Full report / PDF.
- 2Lean Six Sigma Calculator is a twelve-mode scratchpad — capability, DPMO, PCE, RTY, business days, ARL and more without leaving the page.
- 3Phase pills filter the grid — tap "Analyze" to see only the Analyze tools.
- 4Each tool card lists its pinned runs and links straight into the editor. New runs start from "Start a new run".
The 34 tools
What each one is for, in one line.
- CTQ Tree
- Break a customer need down into the measurable, spec-bounded quality targets that drive it.
- Stakeholder Analysis
- Map everyone the project touches by how much power and interest they hold.
- RACI Matrix
- Pin down who is Responsible, Accountable, Consulted and Informed for each task.
- Kano Model
- Classify each requirement as a must-have, a performance driver, or a delighter.
- Run Chart
- Plot time-ordered data to spot trends and shifts before you go deeper.
- Gauge R&R
- Check the measurement system is trustworthy before you rely on its numbers.
- Data Collection Plan
- Operational definitions, sampling, and sample size — decided before you measure.
- Process Map
- An actor-lane flowchart of how the work actually flows today.
- Capability Sixpack
- A six-panel, Minitab-style snapshot of how well a process meets spec.
- Non-normal capability
- Box-Cox, Weibull and Johnson Ppk for data that isn’t bell-shaped (ISO 21747).
- Control Chart
- Shewhart X̄-R / I-MR / p / c charts with 3-sigma limits.
- Sample Size Calculator
- Minitab-style power & n for means, proportions and capability studies.
- OEE Calculator
- Availability × Performance × Quality, plus the Six Big Losses (Nakajima).
- Attribute Agreement
- Cohen’s & Fleiss’ Kappa — do your pass/fail inspectors actually agree?
- 5 Whys
- Drill from the surface symptom to the root cause, one “why” at a time.
- Hypothesis Test
- Guided t-test, proportion and chi-square — is the difference real?
- Scatter + Regression
- Does X predict Y, and how strongly (slope, R², fit line)?
- Box Plot
- Compare the spread and centre of several groups side by side.
- One-way ANOVA
- Three or more groups — is any one mean genuinely different?
- Pareto Chart
- Rank causes biggest-first so you focus on the vital few.
- Normality Test
- Anderson-Darling + Q-Q plot + Box-Cox to check the bell-curve assumption.
- Multi-Vari Chart
- See where variation comes from across 2–3 categorical factors at once.
- Non-parametric tests
- Mann-Whitney, Kruskal-Wallis, Mood’s median — distribution-free.
- PICK Matrix
- Sort candidate fixes by impact × effort — surface the obvious wins.
- Solution Selection
- Weighted-criteria scoring when PICK is too coarse a filter.
- Cost-Benefit
- Dollarise each option — cashflows, payback and ROI for the change.
- Poka-Yoke
- Mistake-proofing — classify and design out errors (Prevent / Warn / Detect).
- Piloting Plan
- A contained trial of the fix — scope, duration, metrics, rollback.
- Design of Experiments
- 2ᵏ full + half-fraction factorial designs, Yates analysis, Lenth PSE.
- Control Plan
- What to monitor, how often, with what limits, and what to do when.
- Response Plan
- When X goes out of control, the pre-agreed action is Y.
- SOP / Work Instruction
- The new way of working, written so anyone can execute it.
- Audit Checklist
- A re-runnable check that the improved process is actually being followed.
- SPC Charts
- X̄/R, X̄/S, p/np/c/u, EWMA, CUSUM — Western Electric + Nelson rules.
The Lean Six Sigma Calculator
Twelve quick modes, nothing to save.
Sitting at the top of the Toolkit is a scratchpad calculator. Unlike the tools below it, it doesn’t store anything against your project — it’s for the quick number you need mid-analysis. Switch between twelve modes:
- Capability (Cp/Cpk)
- Mean + σ + spec limits → Cp, Cpk, sigma level, PPM and a bell curve.
- Attribute Ppk
- Turn a pass/fail defect rate into a Ppk so you can compare it to measured Cpk.
- DPMO
- Defects, units & opportunities → Defects Per Million, sigma level and yield.
- Cycle-time stats
- Paste a column → mean, SD, CV, min/max/range and percentiles (P25–P99).
- Time units
- Convert minutes ↔ hours ↔ days with a configurable working-hours-per-day.
- Business days
- Working days between two dates (or add N) — skips weekends + holiday presets.
- PCE (Lean)
- Process Cycle Efficiency: value-added ÷ total lead time (25% is world-class).
- RTY to sigma
- Multiply per-step yields into Rolled Throughput Yield → DPMO and sigma.
- Z to probability
- Normal-distribution converter: Z-score ↔ probability ↔ percentile.
- CI for mean
- A large-sample (z-based) confidence interval for a population mean.
- Defect cost
- Cost of poor quality + projected savings from a defect-rate reduction.
- ARL (SPC)
- Average Run Length — samples before a false alarm vs. to catch a real shift.
The rule of thumb
When in doubt, let the Assistant point.
You don’t have to memorise the toolkit. Inside any project the Statistical Assistant reviews your data — flagging things like non-normality or a too-small sample — and tells you which tool to reach for next. Promote a Capability Sixpack run straight into a tracked Process, and its capability flows into the dashboard, the Executive summary and the reports automatically.