Engineering lab / Interactive technical portfolio
Synthetic demonstrationA process drifts. Find the signal.
Advance the production timeline, inspect measurements and decide what the evidence supports.
All parts, suppliers, measurements and events below are fictional. Built to demonstrate engineering analysis and software design; no employer or customer engagement is implied.
factory-1.0 · Synthetic operation
Plan: 8 skids / 54.8 h assumed work. Baseline: 8 skids / 54.8 h.
This tab retains your scenario and demo reviews. Reset factory restores the original state.
Factory context / M1 / SYN-RUN-01
Valve-spool inspection history; 90 individual measurements.
Station SYN-ST-M01 / Equipment SYN-MC-01
Selected trace: SYN-WO-003 / SYN-304.
Related illustrative work orders:
Genealogy is illustrative; an assignment does not authorize use of a held component.
Latest diameter
25.160 mm
Sample 68 · SYN-303
Signal observations
32
One observation can trigger several rules
Outside specification
10/68
Counts measured pieces in the selected window
Baseline Cpk estimate
1.74
Within-process σ from the fixed 30-sample baseline
Individuals chart / Limits locked to baseline
Process monitor
Valve-spool outside diameter · target 25.00 mm · specification 24.90–25.10 mm
Measured
25.061 mm
Lot / time
SYN-303 / 14:30
Tool use
90.5 h
Room temperature
21 °C
Sample 52: Beyond 3σ · 8 on one side Within specification.
Evidence before action
Engineering assessment
First signal: sample 37. The upward change is visible before every affected piece becomes a dimensional defect. A control signal and a specification failure answer different questions.
- Fixed center / estimated σ
- 24.997 / 0.019 mm
- Selected window Pp / Ppk
- 0.65 / 0.39
Window performance indices are descriptive. A mixed or unstable process must not be certified capable from these numbers.
Moving range & calculation basis
Baseline mean moving range: 0.021 mm. MR upper limit: 0.069 mm. σ = MR̄ / 1.128; individuals limits = mean ± 3σ. Cp = tolerance / 6σ; Cpk is the smaller distance to a specification limit / 3σ. Window Pp/Ppk use sample standard deviation.
Rules shown: beyond 3σ, eight consecutive values on one side, six strictly increasing/decreasing values, and MR beyond 3.267 × baseline MR̄. This is a stated teaching ruleset.
NIST: individuals charts · Capability basisSynthetic evidence register
Investigate the change
The evidence register covers the complete scenario; the horizon filters measurement visibility.
Tool inspection / sample 70
Edge buildup is documented on the finishing tool. Tool use crosses the scenario service interval during the upward shift; room temperature remains close to its baseline.
Tool-condition change is the leading hypothesis. Correlation alone would not prove it.
Operational response
Contain, correct, verify
- Contain. Hold suspect output since the last demonstrably stable point. Segregate SYN-302 / SYN-303 and inspect diameter; do not convert the sampled defect fraction into an entire-lot count.
- Correct. Inspect and replace the finishing tool, verify its setting and recheck the measurement system before restart.
- Verify. Review samples 71–90 after correction. Require a longer stable run before estimating new capability or adopting new limits.
- Prevent. Add a tool-condition check and a documented intervention trigger to the control plan, with named ownership and traceable lot release.
Inspect measurements and signal log
| Sample | Time | Lot | Diameter (mm) | Moving range | Signal | Disposition |
|---|---|---|---|---|---|---|
| 1 | 06:00 | SYN-301 | 24.993 | — | None | Within spec |
| 2 | 06:10 | SYN-301 | 25.028 | 0.035 | None | Within spec |
| 3 | 06:20 | SYN-301 | 24.984 | 0.044 | None | Within spec |
| 4 | 06:30 | SYN-301 | 24.972 | 0.012 | None | Within spec |
| 5 | 06:40 | SYN-301 | 25.031 | 0.059 | None | Within spec |
| 6 | 06:50 | SYN-301 | 24.992 | 0.039 | None | Within spec |
| 7 | 07:00 | SYN-301 | 25.009 | 0.017 | None | Within spec |
| 8 | 07:10 | SYN-301 | 25.002 | 0.007 | None | Within spec |
| 9 | 07:20 | SYN-301 | 24.965 | 0.037 | None | Within spec |
| 10 | 07:30 | SYN-301 | 24.998 | 0.033 | None | Within spec |
| 11 | 07:40 | SYN-301 | 25.004 | 0.006 | None | Within spec |
| 12 | 07:50 | SYN-301 | 24.980 | 0.024 | None | Within spec |
| 13 | 08:00 | SYN-301 | 25.007 | 0.027 | None | Within spec |
| 14 | 08:10 | SYN-301 | 25.002 | 0.005 | None | Within spec |
| 15 | 08:20 | SYN-301 | 25.004 | 0.002 | None | Within spec |
| 16 | 08:30 | SYN-301 | 24.992 | 0.012 | None | Within spec |
| 17 | 08:40 | SYN-301 | 25.008 | 0.016 | None | Within spec |
| 18 | 08:50 | SYN-301 | 24.987 | 0.021 | None | Within spec |
| 19 | 09:00 | SYN-301 | 24.979 | 0.008 | None | Within spec |
| 20 | 09:10 | SYN-301 | 24.988 | 0.009 | None | Within spec |
| 21 | 09:20 | SYN-301 | 24.992 | 0.004 | None | Within spec |
| 22 | 09:30 | SYN-301 | 25.022 | 0.030 | None | Within spec |
| 23 | 09:40 | SYN-301 | 25.005 | 0.017 | None | Within spec |
| 24 | 09:50 | SYN-301 | 25.023 | 0.018 | None | Within spec |
| 25 | 10:00 | SYN-301 | 25.019 | 0.004 | None | Within spec |
| 26 | 10:10 | SYN-301 | 24.974 | 0.045 | None | Within spec |
| 27 | 10:20 | SYN-301 | 24.985 | 0.011 | None | Within spec |
| 28 | 10:30 | SYN-301 | 24.968 | 0.017 | None | Within spec |
| 29 | 10:40 | SYN-301 | 24.989 | 0.021 | None | Within spec |
| 30 | 10:50 | SYN-301 | 25.021 | 0.032 | None | Within spec |
| 31 | 11:00 | SYN-302 | 25.012 | 0.009 | None | Within spec |
| 32 | 11:10 | SYN-302 | 25.010 | 0.002 | None | Within spec |
| 33 | 11:20 | SYN-302 | 24.998 | 0.012 | None | Within spec |
| 34 | 11:30 | SYN-302 | 25.046 | 0.048 | None | Within spec |
| 35 | 11:40 | SYN-302 | 25.021 | 0.025 | None | Within spec |
| 36 | 11:50 | SYN-302 | 25.013 | 0.008 | None | Within spec |
| 37 | 12:00 | SYN-302 | 25.036 | 0.023 | 8 on one side | Within spec |
| 38 | 12:10 | SYN-302 | 25.039 | 0.003 | 8 on one side | Within spec |
| 39 | 12:20 | SYN-302 | 25.025 | 0.014 | 8 on one side | Within spec |
| 40 | 12:30 | SYN-302 | 25.032 | 0.007 | 8 on one side | Within spec |
| 41 | 12:40 | SYN-302 | 25.034 | 0.002 | 8 on one side | Within spec |
| 42 | 12:50 | SYN-302 | 25.072 | 0.038 | Beyond 3σ, 8 on one side | Within spec |
| 43 | 13:00 | SYN-302 | 25.048 | 0.024 | 8 on one side | Within spec |
| 44 | 13:10 | SYN-302 | 25.034 | 0.014 | 8 on one side | Within spec |
| 45 | 13:20 | SYN-302 | 25.037 | 0.003 | 8 on one side | Within spec |
| 46 | 13:30 | SYN-302 | 25.062 | 0.025 | Beyond 3σ, 8 on one side | Within spec |
| 47 | 13:40 | SYN-302 | 25.069 | 0.007 | Beyond 3σ, 8 on one side | Within spec |
| 48 | 13:50 | SYN-302 | 25.086 | 0.017 | Beyond 3σ, 8 on one side | Within spec |
| 49 | 14:00 | SYN-302 | 25.075 | 0.011 | Beyond 3σ, 8 on one side | Within spec |
| 50 | 14:10 | SYN-302 | 25.054 | 0.021 | Beyond 3σ, 8 on one side | Within spec |
| 51 | 14:20 | SYN-303 | 25.057 | 0.003 | Beyond 3σ, 8 on one side | Within spec |
| 52 | 14:30 | SYN-303 | 25.061 | 0.004 | Beyond 3σ, 8 on one side | Within spec |
| 53 | 14:40 | SYN-303 | 25.097 | 0.036 | Beyond 3σ, 8 on one side | Within spec |
| 54 | 14:50 | SYN-303 | 25.091 | 0.006 | Beyond 3σ, 8 on one side | Within spec |
| 55 | 15:00 | SYN-303 | 25.083 | 0.008 | Beyond 3σ, 8 on one side | Within spec |
| 56 | 15:10 | SYN-303 | 25.090 | 0.007 | Beyond 3σ, 8 on one side | Within spec |
| 57 | 15:20 | SYN-303 | 25.108 | 0.018 | Beyond 3σ, 8 on one side | Outside spec |
| 58 | 15:30 | SYN-303 | 25.119 | 0.011 | Beyond 3σ, 8 on one side | Outside spec |
| 59 | 15:40 | SYN-303 | 25.141 | 0.022 | Beyond 3σ, 8 on one side | Outside spec |
| 60 | 15:50 | SYN-303 | 25.087 | 0.054 | Beyond 3σ, 8 on one side | Within spec |
| 61 | 16:00 | SYN-303 | 25.076 | 0.011 | Beyond 3σ, 8 on one side | Within spec |
| 62 | 16:10 | SYN-303 | 25.123 | 0.047 | Beyond 3σ, 8 on one side | Outside spec |
| 63 | 16:20 | SYN-303 | 25.102 | 0.021 | Beyond 3σ, 8 on one side | Outside spec |
| 64 | 16:30 | SYN-303 | 25.129 | 0.027 | Beyond 3σ, 8 on one side | Outside spec |
| 65 | 16:40 | SYN-303 | 25.131 | 0.002 | Beyond 3σ, 8 on one side | Outside spec |
| 66 | 16:50 | SYN-303 | 25.170 | 0.039 | Beyond 3σ, 8 on one side | Outside spec |
| 67 | 17:00 | SYN-303 | 25.142 | 0.028 | Beyond 3σ, 8 on one side | Outside spec |
| 68 | 17:10 | SYN-303 | 25.160 | 0.018 | Beyond 3σ, 8 on one side | Outside spec |
One connected perspective
Physical requirements become data. Data becomes evidence. Evidence informs an operational decision. These demonstrations connect my manufacturing and quality foundation with the systems thinking used in enterprise transformation and product engineering.
Professional context
Explore my documented manufacturing experience, SAP readiness work and data and product development. The synthetic lab is separate from those professional records.
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