Chapter 23 Exercises — Quality Management

Work these with the chapter closed where you can. Where a question asks for a number, show the arithmetic — a construction answer without units and a basis is not an answer.

Difficulty legend: ⭐ basic · ⭐⭐ applied · ⭐⭐⭐ judgment and synthesis · ⭐⭐⭐⭐ research and extension

Selected answers are in Appendix J. Blank forms — inspection and test plan, nonconformance report, pre-installation conference agenda, benchmark approval — are in Appendix D.

Part A — Conceptual Understanding ⭐

A1. In one sentence each, distinguish quality assurance from quality control, and give one example of each that is not used in the chapter.

A2. The chapter defines quality as "conformance to the contract documents." Give one specific example of work that is excellent by any craftsman's standard and is nevertheless nonconforming. Then give one example of work that is ugly, that you dislike, and that is fully conforming. What do you do about each?

A3. Name the three ITP point types, define each in one sentence, and state what happens in each case if the designated party does not show up.

A4. What is the difference between a mockup and a benchmark installation? Give one reason a project needs both.

A5. List the four dispositions for nonconforming work. For each, name the party whose written approval is required.

A6. Why does it matter who engages and pays the independent testing laboratory? Give two consequences.

A7. A special inspection was required, scheduled, and missed. The concrete has been placed. Name three possible paths forward and rank them by cost.

A8. Define, in your own words, the difference between a punch item, incomplete work, and a warranty item. Which of the three can prevent substantial completion, and why?

A9. Name the four buckets in the cost-of-quality model and give a construction example of each.

A10. The chapter claims a punch list generated at the end of a project is "a symptom of failure." State the argument in three sentences, and then state the strongest objection to it.

Part B — Applied Analysis ⭐⭐

B1. The stamp that did not help. Your mechanical subcontractor's shop drawing for a piece of ductwork was reviewed and stamped "Reviewed — No Exceptions Taken" by the engineer. The drawing shows a duct gauge lighter than the specification requires. The duct is installed. Who owns the nonconformance, and what does the review stamp actually change? Write your answer as the three-sentence paragraph you would put in an email to the subcontractor.

B2. Two labs, one number. On Project A, the testing laboratory is engaged and paid by the owner. On Project B, an identical project, the laboratory is engaged and paid by the contractor. A set of cylinders breaks 8% below the specified strength. Describe how the next seventy-two hours differ on the two projects — not the technical remedy, which is identical, but the conversation, the documents, and the trust.

B3. Reading a matrix. A project engineer tells you: "We're covered on quality — the special inspector is here three days a week." List four categories of quality risk on a 132,000 SF outpatient building that the special inspector's scope does not touch at all.

B4. The pre-installation conference nobody wants. Your roofing subcontractor's PM says a pre-installation conference is "a waste of forty-five minutes, we've done a hundred of these roofs." Write the reply you would actually say out loud on a job site — not a lecture, and not a threat. Then name the two agenda items you would refuse to give up if he negotiated you down to twenty minutes.

B5. Extent unknown. You find a defect in an installed assembly and you do not yet know how far it extends. Your subcontractor wants to keep working in an unaffected area while you investigate. Under what conditions do you allow that, and what do you require in writing first?

B6. A generous architect. The architect tells your superintendent in the corridor, "That's fine, leave it, I don't want to make a thing out of it." The work does not conform. What do you do in the next ten minutes, and why is the answer the same regardless of whether you agree with the architect?

B7. The three punches. Your owner's facilities director submits a 62-item punch list. On review, 31 are conformance items, 18 are requests for things that were never in the contract, and 13 are damage from the owner's own move-in crews. Describe how you respond to all three groups — including what you do with the 18, and how you keep the relationship.

B8. Protection. Walk through a building you know (or a photograph of a finished interior). Identify five installed items that would be damaged by a following trade if unprotected, and for each one name the scope sheet line you would write in buyout and which subcontract it belongs in.

Part C — Calculations and Deliverables ⭐⭐–⭐⭐⭐

C1. Price the wrong letter. Your ITP marks a routine placement as a hold point when the specification treats it as a witness point. The inspector does not come for two days.

Crew: 11 workers at a loaded rate of $76 per man-hour, 8-hour days. Pump truck ordered and released late both days at $1,450 per day. Three loads of concrete returned on day one at 10 CY per load and $148 per CY.

Compute the total cost of the error. Then compute what it would have been with a crew of 22 instead of 11, and state in one sentence what that tells you about where hold points are most dangerous.

C2. Build an ITP. Build a complete inspection and test plan, with all nine columns from §23.4, for structural CMU (concrete masonry unit) walls — the Willow Street first floor. Include at minimum: unit and mortar material verification, layout and bracing, reinforcing placement and lap, grout space cleanouts, grouting operations and lift heights, mortar and grout sampling, prism or unit strength verification, tolerance verification, cleaning method, and the sample panel.

Mark every line H, W, or R. Then, for every H, write the party to notify and the required notice period.

C3. Cost of quality. A contractor tracks the following on a $22,400,000 hard-bid school project:

(a) Sort these into the four cost-of-quality buckets and total each. (b) Compute total cost of quality as a percentage of contract value. (c) Compute the ratio of failure cost to prevention-plus-appraisal cost. (d) The contractor proposes cutting the quality manager to save $46,000. Write the two-sentence rebuttal, using the numbers.

C4. Write the NCR. A 4-hour fire-rated shaft wall has been installed with a fastener spacing of 16 inches on center at the board edges. The listed assembly indicated on the drawings requires 8 inches on center at edges. Fourteen of sixteen locations checked are at 16 inches. The shaft is 4 stories; the affected area is levels 2 through 4. Drywall finishing is scheduled to start in two days.

Write the complete NCR using the field structure in §23.8. Then list all four dispositions with the approver for each, and state which one you recommend and why.

C5. Price it now versus later. Using the structure of the chapter's air barrier drill, price the shaft wall problem from C4 two ways:

• Now, with the board exposed and the shaft accessible. Assume 3,100 SF of affected board area, added fasteners at $0.42/SF, inspection and documentation at $1,200 lump sum, and two days of finishing crew resequencing at $1,900.
• At the fire marshal's final inspection, 11 months later, with the shaft finished, three floors of finished corridor outside it, and the elevator installed. Build your own line items and defend each one. Your total should be a number you would be willing to say in front of a client.

State the ratio.

C6. Back-schedule a mockup. A curtain wall system has a 14-week fabrication lead time after release. The mockup submittal requires 4 weeks for review, 3 weeks to build, 2 weeks to review and revise. Production installation on the first elevation is scheduled for week 62 of the project.

(a) On what week must the mockup submittal be submitted? (b) The submittal is actually issued in week 50. What happens? Quantify the impact if the fabricator's next available slot after a missed release is 5 weeks out, and the enclosure is on the critical path at $10,650 per calendar day of total exposure. (c) Name two things you could do in week 50 that are cheaper than absorbing the delay.

C7. Punch arithmetic. A 68,000 SF building. Your firm's history: continuous area punching yields about 3 items per 1,000 SF at the architect's punch; end-loaded punching yields about 18. Processing cost is $110 per item all-in, before repair cost. Continuous punching costs an additional 6 hours per area walk, 24 areas, at a loaded rate of $94/hour, for both your QC and the subcontractor foreman (two people per walk).

(a) Compute the item count and processing cost under each approach. (b) Compute the added cost of continuous punching. (c) Net it out. Then state the benefit that does not appear in your arithmetic at all.

Part D — Judgment and Ethics ⭐⭐⭐

D1. Thursday. You know a section of installed work does not conform. It is small. It performs adequately. The drywall goes up Thursday. Your superintendent says, "Do we have to make this a whole thing?" No one has asked you to hide anything, and no one will.

Write out (a) exactly what you say, (b) exactly what you send, and (c) what you do if the superintendent's boss calls you an hour later and pushes back. Be specific. "I would do the right thing" is not an answer; the chapter argues that the useful answer is a document, not a speech.

D2. Use as is, with a credit. Your subcontractor installed a specified product in a way that deviates from the manufacturer's instructions in a manner the manufacturer says is acceptable and will still warrant. The architect is willing to accept it as installed with a credit. The subcontractor offers $4,000. You believe the honest value of the deviation to the owner is closer to $18,000.

What do you do? Consider: whose money is it, what is your obligation to the owner under your contract, what happens to the relationship with a subcontractor you will use again, and what the record will look like in three years.

D3. The inspector who is your friend. A special inspector you have worked with for a decade tells you privately that he did not actually observe a placement he signed for, "but it was fine, I was on the next floor and I saw the rebar the day before."

What do you do? Work through, in order: your obligation to the owner, your obligation to the building official, your obligation to a friend, and your own exposure. State what you actually do first.

D4. Schedule pressure as a hazard. In weeks 34 through 36 of Northgate — the acceleration period after the steel delay — near-misses spiked and the scaffold incident occurred on the north elevation. Argue, in a paragraph, that the same production-system pressure that produced a plank that was not re-secured also produces skipped inspections and covered nonconforming work. Then state what a project manager can actually do about it during an acceleration, beyond exhortation.

D5. The number you did not fabricate. The chapter deliberately refuses to cite a published industry statistic for the cost of rework, and gives one contractor's tracked numbers instead. Why? Make the argument both ways: what is lost by not citing a figure, and what is lost by citing one you have not verified.

Part M — Mixed and Interleaved Practice ⭐⭐–⭐⭐⭐

M1. Chapter 7 + Chapter 23 — which document governs. A shop drawing was approved. It deviates from the specification. The mockup shows a third condition. The contract's order-of-precedence clause puts the specifications above the drawings and is silent on submittals and mockups.

Rank the four documents in the order you would argue they govern, and give your reasoning for each rank. Then state which two questions you would put in an RFI before installing anything, and write one of them in full.

M2. Chapter 16 + Chapter 23 — scope sheets and quality. Take any two adjacent trades on a project you know: framing and firestopping, glazing and sealants, roofing and sheet metal, flooring and casework. Write the boundary review: everything that could plausibly fall between them, marked A / B / neither / unclear.

Then write the three scope-sheet sentences that close the gaps, and one ITP line — with a point type — that would catch it in the field if the scope sheets failed anyway. Belt and suspenders is the correct answer here, and explaining why is part of the exercise.

M3. Chapter 14 + Chapter 23 — testing in the CPM. You are building the schedule for a foundation and slab package. Insert the following as real activities with logic, not as notes:

• Laboratory Proctor for a new borrow source (3–5 working days) before the first compacted lift
• Field density results (24-hour turnaround) gating each lift
• 28-day cylinder acceptance
• A field-cured cylinder criterion releasing formwork stripping

Draw the fragment. Which of these four is on the critical path, and which is merely a constraint on a non-critical path? Then state what changes if you negotiate same-day density results with an on-site technician.

M4. Chapter 19 + Chapter 22 + Chapter 23 — the release authority. A concrete foreman on a job you are running tells your assistant superintendent that the slab "is three days old, it's fine, we're stripping."

(a) State the actual criterion for stripping and who holds the release authority. (b) State which cylinder set answers the question and which does not. (c) Describe the conversation you have with the foreman, given the Chapter 19 principle that your leverage over a subcontractor is the subcontract, the schedule, and the coordination — not authority. (d) Write the one ITP line that would have made this conversation unnecessary.

M5. Chapter 31 + Chapter 23 — is it a change or a defect? For each of the following, decide whether it is a quality issue (contractor's cost), a design issue (change-order remedy), or genuinely ambiguous — and state what evidence would settle it:

1. The specification requires a product that the manufacturer has discontinued.
2. The installed sealant joint is 3/8 inch wide; the detail shows 1/2 inch; the specification's tolerance is silent.
3. The architect rejects a paint color that matches the approved sample.
4. A rated wall assembly indicated on the drawings does not have a listing for the deflection condition actually built.
5. The owner's facilities staff want access panels that appear nowhere in the documents.

M6. Chapter 6 + Chapter 23 — quality on the risk register. Take three of the quality failures described in this chapter and its case studies. For each, write the risk-register entry as it should have appeared in preconstruction: risk description, probability, impact in dollars, owner, response strategy, and the contingency or control assigned. Then answer: which of the three would a risk register realistically have caught, and which one requires a field system rather than a register?

Part E — Research and Extension ⭐⭐⭐⭐

E1. Read a real statement of special inspections. Find one — many jurisdictions publish their required form, and many design firms post examples. Identify: which items are continuous and which are periodic; who is designated to perform each; who engages the special inspector in that jurisdiction; and what the final report requires before a certificate of occupancy is issued.

Then build the notification schedule you would run as the project manager: what you would send, to whom, and how many days ahead of each item. Note honestly where the jurisdiction's requirements differ from what this chapter describes — they will, and the differences are the point of the exercise.

E2. Find a real mockup. Visit a job site (with permission and appropriate personal protective equipment) or find published photographs of a construction mockup. Answer: what is it establishing? Is it an appearance mockup, a performance mockup, or both? Where is it standing, and could an installer working on that building actually walk to it in three minutes?

Then ask a superintendent this one question and record the answer verbatim: "Who from the installing crew was at the mockup review?"

E3. The manufacturer's instructions. Pick one common assembly — a self-adhered air barrier, a fire-resistive joint system, a roofing membrane termination, a mortar and grout placement. Obtain the manufacturer's published installation instructions and read them completely.

Then list every requirement in that document that a typical specification would not state explicitly, and that a field crew therefore only knows if somebody handed them this document. Count them. That count is the size of the gap between "the spec says install per manufacturer's instructions" and "the installer knows what to do" — and it is the reason §23.6 exists.