Step 3 · 4 min read
Analyze, Improve, Control
The back half of DMAIC works on iPhone the same way it does on web — Fishbone + 5 Whys for cause hunting, FMEA for risk ranking, Recommendations for the improvement backlog. The screens are native sheets, but the data model is identical.
At a glance
Three artefacts to know.
Fishbone (Ishikawa)
Visual cause diagram — 6M categories with sub-causes feeding the problem spine.
FMEA
Failure modes × Severity × Occurrence × Detection. RPN auto-calculates; Pareto picks the vital few.
Recommendations
Improvement backlog with status (Proposed / Approved / Implemented) and difficulty pills.
Analyze
Fishbone — the visual cause diagram.
The Fishbone tool opens as a sheet from any process. iOS renders the full Ishikawa with the standard 6M categories — People, Process, Equipment, Materials, Environment, Management — coloured branches feeding the central spine, and the problem statement anchored at the bottom.
Each category lists its sub-causes as bullet rows; tap one to expand into its 5 Whys drill-down. The header carries the causes badge (e.g. "10 causes") so you can see the diagram's density at a glance.
Analyze
FMEA — score and prioritise risk.
The register
From the assignment's Measure & Analyze section, open FMEA. Each row captures a failure mode + effect + cause + current control, and you score it Severity × Occurrence × Detection (1–10 each). The RPN updates live as you tap the steppers.
The Pareto
The top of the FMEA screen shows the RPN Pareto — the same red-bars + cumulative-line view as web. The "vital few" failure modes are highlighted so you spend your attention where the risk is.
Improve
Recommendations — the implementation backlog.
The Improve section on the assignment detail screen has one row: Recommendations. Tap to open the list. Each recommendation has a title, description, status pill (Proposed / Approved / Implemented), and difficulty pill (Low / Medium / High).
Tap a row to expand and edit; the Status picker and Difficulty picker are native iOS pickers — tap-and-pick. Implementation impact rolls up to the executive summary.
Control
SOPs + Control plan from the Toolkit.
SOP, Control plan, Response plan, and Audit checklist live as tools in the Toolkit tab (covered next). The runs you create there pin to the assignment and surface in the executive summary's Control section.