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 assignment — the tool remembers the assignment context, so its outputs feed straight back into the executive summary and PDF report.
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 editoropens when you click in. You don’t save — changes autosave as you make them, so closing the tab loses nothing. Every run is pinned to an assignment and can be flagged for the executive summary and the PDF report.
- 1KPI strip — tools used, runs in flight, runs created, and how many are pinned to the executive report.
- 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 assignment 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, executive summary and report automatically.