Connected
Process

Proposals

The optimiser computes the number inside the signed window; the agent explains it. People with the right accept, adjust in band or decline.
Process agent·Line A·Mixer M1·Hold time 55 to 50 min·14:00StayWithheld

Hold time: no number offered

Shorter hold looked possible on Grade A-12.

EV-A-1060
Expected result
ModelledViscosity2450 mPa·s90% interval 2300 to 2620Safety filter failed
Spec 2380 to 2600 mPa·s (dashed). Driven by Hold time.
Why this confidence
Method
Optimiser opt 2.4.0; band from the model of the machine; weakest input modelled
Model fit
Accepted, four checks passed
Safety filter
Failed: Predicted band crosses the upper spec
Evidence
EV-A-1060
Limits
Hold time55 min
4070
Signed by Plant head A. · 9 SeptNow
If stoppedNothing was written.
NoticedProposedWithheld
Process agent·Line B·Tool T3·Melt temperature 236 to 232 °C·14:00StayDeclined

Lower melt temperature from 236 to 232 °C

Lower melt temperature to save heater energy.

EV-B-1988
Expected result
EstimatedScrap rate3.5 %90% interval 3 to 4.1
Spec 0 to 4 % (dashed). Driven by Melt temperature, Tool temperature.
Why this confidence
Method
Optimiser opt 2.3.9; band from the model of the machine; weakest input estimated
Model fit
Accepted, four checks passed
Safety filter
Passed: Inside signed band
Evidence
EV-B-1988
Limits
Melt temperature236 °Cto 232 °C
225248
Signed by Plant head A. · 20 SeptNowProposed
If stoppedNothing was written.
DeclinedShift lead A.: New resin lot on the line; not changing two things at once.
NoticedProposedWaitingDeclined
Process agent·Line A·Mixer M1·Agitator speed 150 to 144 rpm·14:00StayExpired

Lower agitator speed from 150 to 144 rpm

Lower speed on the low-viscosity grade.

EV-A-1011
Expected result
ModelledViscosity2440 mPa·s90% interval 2390 to 2500
Spec 2380 to 2600 mPa·s (dashed). Driven by Agitator speed.
Why this confidence
Method
Optimiser opt 2.3.9; band from the model of the machine; weakest input modelled
Model fit
Accepted, four checks passed
Safety filter
Passed: Inside narrowed band
Evidence
EV-A-1011
Limits
Agitator speed150 rpmto 144 rpm
120130 to 170 narrowed180
Signed by Plant head A. · 9 SeptStamped narrowingNowProposed
If stoppedNothing was written.
NoticedProposedWaitingExpired
Process agent·Line A·Jacket loop·Hold temperature 84 to 88 °C·08:00Recommend-onlyWithheld

Hold temperature: no number offered

Model of the mixer is outside its accepted fit for the new grade A-14, so no number is offered.

EV-A-1201
Expected result
AssumedViscosity2500 mPa·s90% interval 2200 to 2800Fit not accepted
Spec 2380 to 2600 mPa·s (dashed). Driven by Grade change.
Why this confidence
Method
Optimiser opt 2.4.1; band from the model of the machine; weakest input assumed
Model fit
Not accepted, number withheld
Safety filter
Passed: Inside narrowed band
Evidence
EV-A-1201
Limits
Hold temperature84 °C
7880 to 90 narrowed92
Signed by Plant head A. · 9 SeptStamped narrowingNow
If stoppedNothing was written.
NoticedProposedWithheld

All proposals, 14 days

10 on record
All proposals
ProposalSettingStateModeWeakestRaised
Hold time 55 to 50 minHold timeLine A · 55 to 50WithheldStayModelled18 Oct 14:00
Melt temperature 236 to 232 °CMelt temperatureLine B · 236 to 232DeclinedStayEstimated16 Oct 14:00
Agitator speed 150 to 144 rpmAgitator speedLine A · 150 to 144ExpiredStayModelled15 Oct 14:00
Hold temperature 84 to 88 °CHold temperatureLine A · 84 to 88WithheldRecommend-onlyAssumed20 Oct 08:00
Hold pressure 720 to 760 barHold pressureLine B · 720 to 760WaitingStayEstimated20 Oct 12:50
Agitator speed 150 to 158 rpmAgitator speedLine A · 150 to 158WaitingStayModelled20 Oct 13:20
Melt temperature 236 to 239 °CMelt temperatureLine B · 236 to 239WaitingStayEstimated20 Oct 12:00
Hold temperature 84 to 86 °CHold temperatureLine A · 84 to 86Running trialTrialModelled14 Oct 14:00
Cycle time 34.1 to 33.2 sCycle timeLine B · 34.1 to 33.2MeasuringStayMeasured19 Oct 14:00
Hold pressure 700 to 720 barHold pressureLine B · 700 to 720HoldingStayMeasured8 Oct 14:00

Running and measuring

Written values and what Stop does
Hold temperature 86 °CStop restores the checked prior value, 84 °C, from the next batch. If restore fails the line goes recommend-only.Running trialCycle time 33.2 sStop keeps 33.2 s and writes nothing new.MeasuringHold pressure 720 barStop keeps the value and writes nothing new.Holding

Why not

Declined, expired and withheld
Hold time 55 to 50Predicted band crosses the upper specWithheldMelt temperature 236 to 232Shift lead A.: New resin lot on the line; not changing two things at once.DeclinedAgitator speed 150 to 144Nobody decided before it expiredExpiredHold temperature 84 to 88Model fit not accepted, no number offeredWithheld