Case Study 18-1 — Two Levels, One Crew: What Staging Is Actually Worth

Everything and everyone here is a Tier-3 illustrative composite. The numbers behave like real numbers.

Setup

Project: Northgate Outpatient Pavilion — 4 stories, 132,000 gross square feet, CM at Risk with a Guaranteed Maximum Price of $47,500,000. Building dried in on March 28, Year 2.

The work: Interior partitions. Northgate has 18,600 linear feet of metal-stud partitions and 412,000 square feet of gypsum board across all faces and all layers. The framing and drywall subcontractor is Bellweather Interiors, lump sum, with a field foreman named Ty Nakashima who has been hanging board for nineteen years and does not enjoy being managed.

The people: Margo Deacon (general superintendent), Dani Okonkwo (field engineer), Ty Nakashima (Bellweather foreman), Ray Alvarez (project manager, narrating).

The comparison. Levels 2 and 3 at Northgate are nearly the same building. Both are clinic modules: exam rooms off a double-loaded corridor, a nurse core, two consult rooms, a soiled/clean utility pair, and a staff area. Level 2 has 98,000 SF of board. Level 3 has 94,000 SF. Same partition types, same details, same ceiling heights, same crew — Bellweather rotated the same eight hangers and four tenders from Level 2 to Level 3 in the same month.

The only difference was where the board was sitting when they showed up.

What happened

Level 2 — staged by area

In February of Year 2, before the first sheet of board went up on Level 2, Dani spent a little under five hours on something nobody asked for. They took Bellweather's own takeoff, divided Level 2 into eight zones on the floor plan, and computed the board quantity per zone — sheet count by type and length. Then Dani sat down with Ty for about two hours.

Dani: "I want to drop your board in eight piles instead of one."

Ty: "Eight piles is eight places for somebody to bury it."

Dani: "Eight piles against the corridor wall of each zone, chalked, labeled, and delivered the day after your framing inspection clears in that zone. Nothing gets set in the six-foot route. If a pile gets buried it is because your guys buried it."

Ty: (long pause) "How do you know the counts are right?"

Dani: "I took them off your own takeoff. If they're wrong, they were wrong in your bid."

Ty agreed to try it on four zones. By the second week he asked for all eight.

The delivery pattern that resulted: nine hoist loads more than a single bulk drop would have taken, because zone deliveries are less efficient per trip than dumping everything at the landing. Nine loads at eight minutes each is 72 minutes of hoist time — call it $126 of equivalent hoist capacity.

Level 2 result: 1,156 man-hours to hang 98,000 SF.

98,000 SF ÷ 1,000 = 98 units 98 × 11.8 MH per 1,000 SF = 1,156.4 MH

Level 3 — one drop, no zones

Level 3 started six weeks later. Dani was pulled onto the imaging-suite rough-in coordination. Nobody did the zone takeoff. Nobody chalked the routes. The board came up the hoist over three days in bulk and got stacked at the hoist landing on the west end, because that is where the hoist is and because nobody had told anyone otherwise.

Ty's crew hung Level 3 from a single pile at one end of a 240-foot floor plate.

Level 3 result: 1,372 man-hours to hang 94,000 SF.

94 units × 14.6 MH per 1,000 SF = 1,372.4 MH

Margo caught it on day six. By then the crew had been carting board an average of 180 feet each way, twice — once out of the hoist-lobby pile into a rough working pile, once from the working pile to the wall. Two Kestrel laborers spent six days moving board out of the hoist lobby so that Cardinal Mechanical and Halcyon Electric could get their own material off the hoist.

The arithmetic

Step 1 — Normalize. Levels 2 and 3 are not the same size, so compare rates, not totals. Apply Level 2's demonstrated rate to Level 3's quantity:

That is a 23.7% productivity loss — 14.6 ÷ 11.8 = 1.237 — on the same floor plate, with the same crew, in the same month.

Step 2 — Price the excess.

Step 3 — Price the prevention.

Return: $25,133 ÷ $658 ≈ 38 to 1.

Step 4 — Scale it. The excess on Level 3 works out to $17,898 ÷ 94,000 SF = $0.19 per square foot of board. Applied to all 412,000 SF on the job:

412,000 SF × $0.19/SF = $78,280 — on drywall alone, on a job with more than thirty trades.

Step 5 — Schedule. Level 3's finish start slipped 3 work days, which mattered because ceiling grid, in-wall inspections, and the medical-gas rough-in all queue behind board. Three days of float is not $10,650 a day unless it is on the critical path, and it was not — but float is a shared, consumable project asset, and Northgate spent three days of it on cart-pushing.

Analysis

Who paid, and in what order. Bellweather is a lump-sum subcontractor. The $17,898 came out of their margin first, not Kestrel's. That is the fact that makes this case study interesting, because it explains why so many general contractors never fix it: the loss lands somewhere else, invisibly, and the cost report shows nothing.

Here is where it actually shows up on Kestrel's books:

1. Ty stopped volunteering. He stopped telling Margo about problems two days early because he stopped believing it changed anything. That is theme 6 with a price tag — you build with people, and information flow is the first thing to die.
2. The crew got quieter and slightly smaller. Bellweather's best two hangers moved to another Bellweather job in month fourteen. Nobody announced it. Foremen protect production, and they protect it by moving their best people to jobs where the conditions let them earn.
3. Bellweather's next bid to Kestrel was higher. Not because anyone made a decision — because their estimator's historical cost data now includes Northgate's Level 3.
4. Kestrel paid the $4,992 and the $2,243 in cash, in general conditions, this month, and coded it to cleanup and general labor where nobody ever looked at it again.

Why staging works — the mechanism. It is not motivation and it is not discipline. It is travel distance multiplied by frequency. A hanger sets a sheet roughly every three to five minutes when conditions are good. Every sheet that requires a 180-foot round trip instead of a 25-foot one adds roughly a minute and a half of walking to a five-minute task. That is not a 30% loss on the walk; it is a 30% loss on the whole task, repeated 1,958 times on Level 3.

94,000 SF ÷ 48 SF per sheet = 1,958 sheets 263.2 excess MH × 60 = 15,792 excess minutes ÷ 1,958 sheets = 8.1 excess minutes per sheet

Eight minutes per sheet. Nobody was loafing. Everybody was walking.

Why nobody catches it. Because 14.6 man-hours per 1,000 SF does not look wrong. It is a perfectly ordinary production rate. It only looks wrong next to 11.8, and you only get 11.8 next to it if you deliberately created the comparison. You cannot see a productivity loss that you never had a baseline for, which is why superintendents who track production rates by area — and Chapter 20 will teach you how — find money that nobody else can see.

The uncomfortable question. Dani's five hours produced $25,133 of value. Dani spent that month's remaining time on imaging-suite coordination, which was genuinely important. The honest lesson is not "always do the zone takeoff." It is that staging planning is one of the highest-return uses of field engineering time on any project, and on most jobs it is the first thing that gets dropped when somebody gets busy — because it is nobody's deliverable, nobody's contract requirement, and nobody's KPI.

Put it in somebody's job description. On Northgate, from Level 3 forward, the floor-staging plan became a required attachment to the two-week look-ahead, and Margo would not accept a look-ahead without it.

Discussion questions

1. Bellweather ate $17,898 of the $25,133. Kestrel paid $7,235 in cash. Argue both sides: is it Kestrel's problem, given that Bellweather signed a lump-sum subcontract that made productivity their risk?
2. Ty initially resisted zone staging ("eight piles is eight places to bury it"). His objection was not stupid — what real failure mode was he describing, and what specific control in Dani's plan addressed it?
3. The Level 3 loss showed up on Kestrel's cost report as $4,992 of laborer time coded to cleanup. If you were reading that cost report in month fourteen, what would you have concluded, and what would you have missed?
4. Dani's zone takeoff took five hours and returned $25,133. Why do you think this work gets skipped on most projects? Name three organizational reasons, not personal ones.
5. Suppose Bellweather comes to you in month sixteen with a disruption claim for the Level 3 loss. Using Chapter 33's framework of entitlement, causation, and damages, which of the three would be hardest for them to prove, and what contemporaneous record would have made it easy?

Your turn

Take Level 4 of Northgate: 90,000 SF of gypsum board, a 240-foot by 130-foot floor plate, one hoist landing at the west end, and the same eight-hanger, four-tender crew.

Produce a one-page floor staging plan:

• Divide the floor into zones and state your logic for the division (partition density? sequence? inspection areas? crew size?).
• Compute the board quantity per zone. Assume board is distributed roughly in proportion to zone area, and that a 4-foot by 12-foot sheet is 48 SF.
• Specify the primary route width and where it runs.
• State the delivery trigger for each zone — what condition must be true before board lands there.
• Estimate your man-hours at 11.8 MH per 1,000 SF, then state what it would cost at 14.6, and put that difference in a box at the top of the page. That box is the argument you will use when somebody tells you they do not have time to do this.