Illustrative case study: built on SigmaForge demo data, not a customer result.
Case study 01Manufacturing improvement program
Acme Manufacturing: six projects run as one program
A plant runs its improvement work as a portfolio: six DMAIC projects at different stages, an idea queue, and one project closed with its savings checked against invoices by someone who did not lead it.
- projects
- 6
- every DMAIC phase in play
- claimed
- $92,000
- Forklift Downtime Reduction
- validated
- $88,000
- by the owner, not the lead
- gate waiting
- 1
- Line 3, Measure
Situation
In the demo, Acme’s improvement team is Elena Torres (admin), Sandra Kirchner (the OE manager who reviews tollgates), David Rodriguez (an executive with read-only access) and three practitioners: Priya Nadar, Marco Silva and Nathan Chen. The organization has 25 seats, seven of them filled counting its owner, and a five-day service level for tollgate reviews.
Its problems are the everyday ones of a plant. Packaging Line 3 defects averaged 4.2% over Q1, up from 2.8% in Q4, driving about $12,000 a month in scrap. Changeovers averaged 47 minutes against a 22-minute benchmark. The wrong SKU was picked on 2.1% of warehouse orders. Boilers ran at 71% efficiency against an 82% benchmark. The forklift fleet was down 18% of the time. Sales orders were reworked 14% of the time because of missing or invalid data.
Approach
The demo shows the program at one moment, with each project at a different point. Forklift Downtime Reduction is the one that has been all the way through, so it is the one to follow phase by phase. Elena Torres led it with Marco Silva and Nathan Chen, and Sandra Kirchner reviewed every gate.
- Step 01
Define
A project charter from DocuForge: downtime averaging 18% against an 8% target, with a goal to halve it and save about $85,000 a year in rentals and delays.
- Step 02
Measure
A baseline study in DataForge confirmed 18% average downtime.
- Step 03
Analyze
A DataForge Pareto showed four causes account for 81% of the downtime.
- Step 04
Improve
A designed experiment (DOE) in DataForge to optimize the preventive-maintenance interval.
- Step 05
Control
An I-MR control chart holding downtime at 6.4% with no out-of-control points, and an ImpactMatrix record of the realized impact.
What the platform produced
- Project charters from DocuForge on every project, plus a SIPOC of the packaging process and a data collection plan for Line 3.
- A Line 3 baseline capability study (Cpk 0.72, not yet capable) and a Gage R&R on the torque gauge at 4.5% of study variation, acceptable, so the baseline describes the process and not the instrument.
- Pareto charts that narrowed changeover time to cleaning, tool changes and calibration (72% of the time) and forklift downtime to four causes (81%).
- A regression of boiler efficiency on load (R² 0.78) and a designed experiment on burner tuning.
- A fishbone, a five-whys chain and a mistake-proofing design from the Lean tools; the order-entry fix is form validation.
- Control charts: an I-MR chart holding forklift downtime at 6.4%, and a p-chart with order-entry rework trending to 4%.
- An ImpactMatrix return for the forklift project: $92,000 a year against an $18,000 implementation, paying back in 2.3 months.
Results
Forklift Downtime Reduction closed with all 5 gates approved by Sandra Kirchner, none of them by Elena, who submitted them. The team projected $85,000 a year and claimed $92,000. The organization’s owner, who did not lead the project, validated $88,000 with a note: verified against rental invoices and maintenance logs, and $4,000 of the claim was one-time, not annual.
Across the five open projects, $560,000 of savings is projected, and the results view keeps it apart from the $92,000 claimed and the $88,000 validated, so nobody adds an estimate to a result.
The delivery board shows what needs attention without anyone compiling it: the Line 3 Measure gate is waiting for Sandra’s review; Warehouse Picking Errors has had no activity for 14 days and is flagged at risk; Order Entry Rework is past its target date; and Boiler Energy Optimization’s Improve phase was due ten days ago, so its plan shows as slipped. The idea queue holds four ideas, one at each stage: new, scored, approved and declined.
What the team learned
Validate against source documents.
The $4,000 difference was a one-time saving counted as annual. It was found because someone other than the lead checked the invoices.
Measure the gauge before the process.
With the Gage R&R at 4.5%, the Cpk of 0.72 is a fact about Line 3, and the team can act on it.
Let the board run the status meeting.
A waiting gate, a quiet project, a late one and a slipped plan are four decisions, and the board lists them.
