Log at a glance
Log as of Sep 28, 2026 Revision D accepted for quoting Bore tolerance question open 9 days
Every open specification question on the six active Tarrow RFQs, each tied to the drawing revision it was asked on and to the person who owes the answer. Prepared by the Keelson quoting engineer for the Tarrow design engineer, Ingrid Solheim, director of purchasing at Tarrow Pump Systems, and the Keelson manufacturing engineer. Tarrow emailed housing drawing revision D to a Keelson salesperson on Sep 24 while engineering was still quoting revision C. Rosalind Chau, vice president of engineering at Keelson Precision Manufacturing, decided that revision D is the accepted revision for quoting, and Benedict Oyelaran, commercial operations manager, superseded the three open revision C questions.
- Questions logged
- 22 across RFQ 5102, 5107, 5111, 5116, 5120 and 5124
- Incorporated
- 15 questions answered and built into quote inputs
- Waiting for engineering
- 4 questions, owed by the Keelson manufacturing engineer
- Waiting for a customer decision
- 3 questions, owed by Ingrid Solheim with the Tarrow design engineer
- Accepted revision for quoting
- Housing drawings revision D; revision C is superseded
Open questions
Seven questions are open. Four wait for a Keelson engineering response and three wait for a Tarrow decision. Days open are counted to Sep 28. The three revision C questions are marked superseded and have been asked again on revision D; each keeps the age of the original so the wait stays visible. The three keep the state Customer decision until Tarrow answers on revision D.
| Question | RFQ | Revision | State | Owed by | Due | Days open |
|---|---|---|---|---|---|---|
| Bore tolerance on the pump casing seat: the callout and the title block differ | RFQ 5102, HSG-410 housing | C, asked again on D | Customer decision | Ingrid Solheim | Oct 8 | 9 |
| Flange face flatness after machining | RFQ 5111, HSG-512 housing | C, asked again on D | Customer decision | Ingrid Solheim | Oct 8 | 6 |
| Port thread callout, one thread class on the view and another in the notes | RFQ 5124, HSG-410 housing | C, asked again on D | Customer decision | Ingrid Solheim | Oct 8 | 4 |
| Machining allowance on the bore face after the revision D change | RFQ 5102, HSG-410 housing | D | Engineering response | Keelson manufacturing engineer | Oct 6 | 3 |
| Balance grade required after final machining | RFQ 5107, impeller | B | Engineering response | Keelson manufacturing engineer | Oct 6 | 3 |
| Surface finish on the seal journal | RFQ 5116, shaft assembly | A | Engineering response | Keelson manufacturing engineer | Oct 6 | 2 |
| Flatness of the mounting face after welding | RFQ 5120, mounting bracket | A | Engineering response | Keelson manufacturing engineer | Oct 6 | 1 |
Questions by RFQ and state
Each bar is one active RFQ. The three colors are the three states a question can be in today. RFQ 5102 holds the most questions, 6 of the 22, and the only RFQ with both an engineering response and a customer decision outstanding.
The counts on the block are the Sep 28 counts. The three questions waiting for a customer decision are the revision C questions that were superseded and asked again on revision D, so they stay in that column until Tarrow answers.
Questions per week
Questions are logged when an engineer or a buyer raises them, not when they are answered. The peak was 5 in the week of Aug 31. The last full week, Sep 21, logged 3.
Across the six weeks the log holds 22 questions, which matches the count by RFQ above. A rising line after the revision change would mean the new drawing raised new questions.
Incorporated so far
Fifteen of the 22 questions are incorporated: answered, accepted by Tarrow and built into the quote inputs for their RFQ. Four wait for engineering and three wait for Tarrow.
Revision control
- Accepted revision for quoting
- Housing drawings revision D. Revision C is superseded and no new quote is built on it.
- Revision on every question
- Each question is logged with the revision letter it was asked on. A question without a revision letter is returned to its sender.
- Who accepts a revision
- Rosalind Chau, vice president of engineering. A drawing emailed to a salesperson is logged at once, but it does not become the accepted revision until she accepts it.
- Answers belong to one revision
- An answer applies only to the revision it was given on. When the revision changes, the question is superseded and asked again on the new revision.
- States on the log
- Question raised, engineering response, customer decision, incorporated, superseded.
- Customer decisions
- Tarrow makes the requirement clarification. Keelson records it and does not choose between two readings of a drawing.
"Every answer on this log belongs to one drawing revision. If the revision changes, the answer is asked again, and nobody builds a quote on the old one."
Rosalind Chau, Vice president of engineering, Keelson Precision Manufacturing
From question to incorporated
The path of one question is below. The messages run for every question. The note at the bottom applies only when the revision changes while a question is open, as it did on the three revision C questions.
- Question logged with its revisionKeelson quoting engineer
- Engineering responseWhat Keelson can hold
- Decision requested against that revisionIngrid Solheim, with the Tarrow design engineer
- Marked incorporatedQuote inputs updated
- If the revision changesMarked superseded and asked again on the new revision
Closing the bore tolerance question
The bore tolerance question on RFQ 5102 shows how a question closes. The marks below are as of Sep 28.
- Question raised on housing revision C, Sep 19
- Keelson manufacturing engineer states the bore tolerance Keelson can hold
- Revision D accepted for quoting, revision C question superseded
- Ingrid Solheim gives the decision against revision D, due Oct 8
- Decision incorporated into the RFQ 5102 quote inputs
Owners and dates
Owners and dates
- Give the decision on the bore tolerance, flange flatness and port thread questions against revision D. Owner: Ingrid Solheim, Oct 8open
- Answer the four open engineering questions. Owner: Keelson manufacturing engineer, Oct 6open
- Rebuild the quote inputs for RFQ 5102, 5111 and 5124 on revision D once the decisions arrive. Owner: Keelson quoting engineer, Oct 9open
- Check that no draft quote cites housing revision C. Owner: Keelson quoting engineer, Oct 9open
- Mark the three open revision C questions superseded and ask them again on revision D. Owner: Benedict Oyelaran, donedone
- Ingrid SolheimDirector of purchasing, Tarrow Pump Systems, owes the three customer decisions
- Rosalind ChauVice president of engineering, Keelson Precision Manufacturing, accepts the revision
- Benedict OyelaranCommercial operations manager, Keelson Precision Manufacturing, owns the log and its routing