Reviewable proposal
The proposal shows direct cost, overhead, profit, contingency, inclusions, exclusions, qualifications, and assumptions alongside the $33,670.23 total.
Worked drywall case study · Windows
Four wall runs.
One bid you can inspect.
This is the full estimating chain: where the quantities came from, how waste and pricing were applied, what the finished scope communicates, and what still needs field and market verification.
Worked practice project · Illustrative prices · Every source and assumption stays visible
1 · Start with the source
A small office plan with enough detail to audit the math.
Takeoff Field Tools created this two-sheet practice set for estimators, instructors, and independent reviewers. The first sheet provides the measurable plan; the second provides the drawing assumptions and quantity schedule.
The estimating scope: new full-height metal-stud partitions, gypsum wall faces, acoustic batt, gypsum ceilings, and finished returns at seven door openings.
The boundaries: painting, doors, frames, hardware, firestopping, permits, hazardous-material work, and concealed conditions are excluded from the worked bid.
Review both plan sheets →
2 · Measure the work
The plan becomes four reviewable quantities.
Each takeoff item retains its markup, sheet, revision, layer, phase, formula context, and review state. A reviewer can return from an estimate line to the measured source instead of reverse-engineering a spreadsheet total.
- Partition runs
- 220 LF
- Net wall faces
- 4,106 SF
- Net ceiling
- 3,500 SF
- Door returns
- 7 EA
- Warnings
- 0
- Takeoff items
- 4
The four partition runs are 45, 45, 80, and 50 feet. Wall faces use a ten-foot height, two faces, and a 294-square-foot door-opening deduction. The ceiling excludes a 100-square-foot mechanical room.
3 · Price it consistently
Four measurements feed eight estimate lines.
The example keeps measured quantity separate from waste, unit price, overhead, profit, and contingency. Change one assumption and the reviewer can see which part of the number moved.
| Estimate line | Quantity | Rate | Line total | Visible logic |
|---|---|---|---|---|
| Studs, track, fasteners, and anchors | 231.00 LF | $7.85 | $1,813.35 | 220 LF plus 5% waste |
| Partition layout and framing labor | 220.00 LF | $8.50 | $1,870.00 | Measured partition runs |
| Type X board | 4,516.60 SF | $0.78 | $3,522.95 | 4,106 SF plus 10% waste |
| Hang, tape, and Level 4 finish | 4,106.00 SF | $1.85 | $7,596.10 | Net wall faces |
| Acoustic batt | 2,155.65 SF | $0.62 | $1,336.50 | Half the wall-face area plus 5% waste |
| Ceiling board | 3,850.00 SF | $0.92 | $3,542.00 | 3,500 SF plus 10% waste |
| Hang, tape, and finish ceiling | 3,500.00 SF | $2.10 | $7,350.00 | Net ceiling area |
| Finish door-opening returns | 7 EA | $65.00 | $455.00 | Counted door symbols |
Direct cost$27,485.90
Overhead$2,198.87
Profit$3,023.45
Contingency$962.01
Worked bid$33,670.23
Pricing boundary: these sample rates make the workflow easy to inspect. They are not a recommendation for any market, company, project, or bid. Verify current labor, material, equipment, tax, production, access, and field conditions.
4 · Communicate it clearly
The total leaves with its scope and reasoning.
Source trace
Each priced line carries its cost code, quantity, unit, source item, sheet revision, formula, and amount so another estimator can review it.
Production handoff
The same project also produces the bid scope, budget baseline, six-activity schedule, purchasing record, workbook, and restorable project package.
- Show exactly what is included and excluded before the number is accepted.
- Return a questioned estimate line to the quantity and plan that produced it.
- Keep the wall assembly, formulas, scope language, and estimate structure for the next project.
- Review carried values against the next drawing revision, market, and field conditions.
What the example demonstrates
Traceability, not false certainty.
The example demonstrates that one local project can keep plan markup, measured quantities, formulas, cost items, estimate lines, scope language, and exports connected.
It does not demonstrate that a drawing is complete, a rate is current, an assembly is code-compliant, a site condition is known, or a bid should be submitted without estimator review.