Brand C · Batch PA-02
ClosedInvestigation into Pumpkin/ Gourd.
Problem statement
Brand C PA-02. Major defect: Pumpkin/ Gourd flagged by 2 panelists.
How we investigated
Triggers that opened this investigation
- [HIGH] Major defect Pumpkin/ Gourd flagged by 2 panelists
Data reviewed
Defects by impact
| Defect | Weighted variation | Panelist agreement |
|---|---|---|
| Pumpkin/ Gourd | 20.0 | 2 panelists |
Information gathered (7)
Method
- Issue foundCheck yeast residence time in the cone. Is the yeast autolising while waiting for the fermenter to be moved?Addresses: Green Apple / Pumpkin
Reviewed handover sheet and the cone was never dumped, fermenter sat crashed on yeast cone and was moved to CF with yeast
- ClearedWas there delays moving the fermenter causing the fermenter to sit on the yeast for too long?Addresses: Green Apple / Pumpkin
Moved on time
- SkippedAre you completing a secondary or long term aging/ lagering step for the beer? Is the temperature too high? What % viability are you seeing in the yeast present at the start and end of aging/ lagering?Addresses: Green Apple / Pumpkin
Skipped: not secondary aged
- ClearedCheck boil vigor and length (minimum 60m); ensure rapid cooling of wort post-whirlpool.Addresses: Pumpkin
Boil parameters on the BH log were in spec
Measurement
- Issue foundMonitor yeast carryover into BBT, and packaging as well as storage temperature of packaged beer. Are you achieving <1MM / ml after fermentation? Is there access cells in aging/ brite.Addresses: Green Apple / Pumpkin
Yeast was over 2MM cells in BBT , centrifuge run had multiple large yeast clumps hit the run hard
- SkippedFermentor ballings audited using handheld DMA near end of fermentation?Addresses: Green Apple / Pumpkin
Skipped: DMAs were complete
Material
- SkippedConfirm wort receives vitamin/nitrogen additives if malt < 40% of grist? How much FAN is the wort containing?Addresses: Green Apple / Pumpkin
No A
Skipped: No Adjunct
Root causes confirmed (3)
- Man
There is no mark on the fermenter doc for cone collected complete, brewer was unsure of the impact
- Method
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- Measurement
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5-Why chain walks
The full reasoning trail behind the root causes confirmed above.
Why 1? Why is the Man-side contributing to this defect?
→ Pumplkin notes were detected on the brand
Why 2? Why is it that pumpkin notes were detected on this brand — what do you believe led to those notes being present?
→ Brand sat on yeast after crash for extended period of time
Why 3? Why is it that the brand sat on yeast for an extended period after crashing — what led to that extended contact time?
→ Brewer from weekend shift assumed the crop was completed
Why 4? Why is it that the weekend shift brewer assumed the crop had already been completed — what led to that assumption?
→ There is no mark on the fermenter doc for cone collected complete, brewer was unsure of the impact
Root cause
There is no mark on the fermenter doc for cone collected complete, brewer was unsure of the impact
Why 1? Why did Brand C · PA-02 score a 8.66?
→ Pumpkin/ Gourd was the major defect detected.
Why 2? Why did Brand C · PA-02 score a 8.66?
→ asdfasdfasd
Root cause
asdfasdfasd
Why 1? Why did Brand C · PA-02 score a 8.66?
→ Pumpkin/ Gourd was the major defect detected.
Why 2? Why did Brand C · PA-02 score a 8.66?
→ asdfasf
Root cause
asdfasf
Corrective actions (3)
Man
- Effect BlockingCheck 2026-09-17
Training team on impacts of sitting on yeast
Method
- Root CauseCheck 2026-09-17
Add a check and signoff for cone collection on the ferm sheet
Measurement
- Effect BlockingCheck 2026-09-17
Add BBT CC check to verify carryover