Connected
Investigation · open

High viscosity on Grade A-12

Opened by Quality head A. · 2 lots · 2 runs
Evidence

Case file

  • 17 Oct 14:00evidence · Viscosity drifting up over 9 batches
    EV-A-1180
    Measured
  • 18 Oct 14:00link · Lots 3307 and 3296 linked to batches 2416 and 2417
    EV-A-1185
    Estimated
  • 19 Oct 14:00note · End-of-hold torque high on both; charge mass in recipe
    EV-A-1188
    Measured

Lots in this case

Lots
LotRiskPredictedSpecJoinLinks
3307At risk2540 to 2630 mPa·s2380 to 2600estimated0.93, 0.86
3296At risk2540 to 2630 mPa·s2600 to 2840estimated0.86, 0.93

Linked runs

Batch 2416Viscosity 2419.9 mPa·s · Energy per batch 408 kWhBatch 2417Viscosity 2453.5 mPa·s · Energy per batch 415.8 kWh

Conclusion

Open. A conclusion is written once the evidence answers the question.

Quality head can send corrections

Proof record

Lot 3307 viscosity save
No changeR2Unknown
Effect Viscosity vs predicted +12 mPa·s, interval -30 to 54 mPa·s.
Why this confidence
Method
Before and after on matched lots
Diagnostics
Unanchored until lab result
Open the four questions

Corrections from this case

raise agitator speedsent