Laminator 2 Membrane Fatigue · 08:00–12:00

Cluster cluster_laminator2_membrane_fatigue

← Back to mod_showcase_bubble_001

Modules affected

13 Scrap · 4 B · 0 C · 6 clean

Defect rate

74%

across the cluster

Avg signature match

74%

coherence 96%

Net impact

$2,410

risk $3,910 − salvage $1,500

Root cause: Laminator 2 membrane health drifted from 0.94 (06:00) to 0.78 (action threshold) by 11:59. X-bar R warning crossed at 09:14; engineer accepted membrane swap recommendation but scheduled it for 12:00. 23 modules processed in the degraded-vacuum window; 17 developed bubble defects, 6 escaped.

Excursion timeline · 08:00 → 12:00 · 240 min

Vacuum Hold Pressure · Laminator 2

X-bar R chart

warn 8 · action 12 mbar

Vacuum hold pressure drifted from nominal 4 mbar to 6.1 mbar by 09:14, crossing the 8 mbar warning during the showcase module's cycle (peak 7.8 mbar). After membrane replacement at 12:00, returned to 3.8 mbar.· Green dashed: If predictive maintenance triggered at 06:00.

Membrane Health · Laminator 2

I-MR chart

warn 0.85 · action 0.78 index

Membrane health degraded steadily from 0.94 toward action threshold 0.78. Crossed warning 0.85 at ~08:00 — six hours before scheduled replacement.

Lamination Bubble Rate · Laminator 2

p-chart

warn 0.02 · action 0.04 proportion

Per-lot bubble defect proportion crossed action threshold 4% during the affected 4-hour window, returning to nominal after the 12:00 membrane swap.

Scrap with defect B/C-tier UnaffectedEach tick = one cluster module's processing time

Affected modules · 23 total

sort

mod_showcase_bubble_001

3 bubbles top-right + 2 frame-edge — classic membrane fatigue signature.

mod_cluster_laminator2_002

2 active-area bubbles in same corner.

mod_cluster_laminator2_003

Bubble cluster top-right.

mod_cluster_laminator2_004

Three smaller bubbles — same weak corner.

mod_cluster_laminator2_005

Active-area bubbles — Scrap.

mod_cluster_laminator2_006

Top-right concentration.

mod_cluster_laminator2_007

mod_cluster_laminator2_008

mod_cluster_laminator2_009

Inactive-area bubble at frame edge.

mod_cluster_laminator2_010

mod_cluster_laminator2_011

Inactive-area bubble — combined classification.

mod_cluster_laminator2_012

mod_cluster_laminator2_013

Small inactive-area bubble.

mod_cluster_laminator2_014

Below 15 mm² — B-tier.

mod_cluster_laminator2_015

mod_cluster_laminator2_016

mod_cluster_laminator2_017

Small bubble — B-tier.

mod_cluster_laminator2_018

Processed during cycles with better vacuum hold (post-09:54 spike) — escaped.

mod_cluster_laminator2_019

Processed during cycles with better vacuum hold (post-09:54 spike) — escaped.

mod_cluster_laminator2_020

Processed during cycles with better vacuum hold (post-09:54 spike) — escaped.

mod_cluster_laminator2_021

Processed during cycles with better vacuum hold (post-09:54 spike) — escaped.

mod_cluster_laminator2_022

Processed during cycles with better vacuum hold (post-09:54 spike) — escaped.

mod_cluster_laminator2_023

Processed during cycles with better vacuum hold (post-09:54 spike) — escaped.

Cluster Bayesian coherence — is this one cluster or many?

Confidence that all 23 modules share a single causal root:96%

Predicted signature

Spatial bubble cluster co-located with weakest seal corner (top-right of Laminator 2 chamber)

Observed signature

17 of 23 modules show top-right bubble concentration; 6 unaffected

Average signature match across affected modules: 74%. High coherence means the defects look like the same phenomenon — strong evidence of a common cause.

Economic impact

Total modules affected23

Scrap13

B-tier4

C-tier0

Unaffected (A-tier)6

Revenue at risk$3,910

Salvage realised$1,500

Net impact$2,410

If the platform's recommendation had been accepted at the right moment, projected savings:~$2,049 across this cluster.

Cluster-wide recommendations

Adjust predictive maintenance triggers — fire when membrane health crosses 0.85, not 0.78

process

Membrane health crossed 0.85 at 06:00; recommendation should have fired ~3 h earlier than 09:16.

→ Earlier swap → all 17 cluster defects prevented in the equivalent future event.

Add 'cycles since membrane swap' tile to Laminator 2 operator UI

station

Membrane was at 2,840 cycles, last swap recommended at 3,000 — operator did not see the trend.

→ Visible degradation curve enables proactive scheduling.

Move planned membrane swaps to start-of-shift, not lunch break

shift

12:00 swap window placed degradation peak in the most-trafficked hours.

→ Aligns swap window with low-throughput period.

This cluster page shows how a single upstream excursion produces a coherent pattern across many modules. In production, every excursion that exceeds SPC thresholds is automatically grouped into a cluster, and cluster-level analysis runs continuously.