6.2 Allocating & Managing Project Resources: Hours, Rates & Leveling

Workload Forecasting, Resource Leveling & Labor Economics

Projecting Staff Hours Over Time

To prevent fee exhaustion before deliverables are complete, project managers project labor hours over time using the project's net direct labor budget:

$\text{Planned Staff Hours} = \frac{\text{Phase Net Labor Budget (\$)}}{\text{Blended Direct Billing Rate (\$/hr)}}$

For example, if the Construction Documents phase has a net architectural labor fee budget of $120,000 and the project team has a blended hourly billing rate of $150/hour, the PM can allocate a total of 800 staff hours across the duration of the phase ($120,000 / $150 = 800\text{ hours}$).

Billing Rates vs. Actual Direct Compensation

Architectural financial management strictly differentiates between an employee's direct hourly salary and their client billing rate:

• Direct Hourly Salary: Unburdened base compensation, calculated as annual base salary divided by 2,080 standard annual work hours (e.g., $$83,200 / 2,080 = $40.00/\text{hr}$).
• Hourly Billing Rate: The rate charged to clients, calculated by multiplying the direct hourly salary by the firm's target Net Multiplier (typically 2.75 to 3.25): $\text{Hourly Billing Rate} = \text{Direct Hourly Salary} \times \text{Net Multiplier}$ At a 3.00 net multiplier, a staff member earning $40.00/hour is billed at $120.00/hour. This billing rate covers the employee's direct wages, firm overhead expenses (fringe benefits, office rent, software, insurance), and operating profit.

Resolving Staff Bottlenecks: Resource Leveling

During peak production periods—such as the final weeks before a 100% Construction Documents submittal—labor demand frequently exceeds available team capacity. Unchecked, this results in severe staff burnout, increased drafting errors, or costly uncompensated overtime.

Resource leveling is the scheduling technique used to smooth resource demand across a project timeline:

• Rescheduling Non-Critical Activities: Tasks with available float are moved later in the schedule to flatten labor spikes without delaying the project completion date.
• Cross-Studio Reallocation: Shifting production staff from projects in slower design phases (e.g., pre-design or early SD) to support the crunch team.
• Temporary Technical Augmentation: Engaging specialized contract drafters or freelance BIM technicians to handle repetitive detailing, preserving core staff for coordination.
• Scope Phasing: With client agreement, separating deliverable packages (e.g., early site/foundation packages) to distribute drafting effort over a longer duration.

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Building and Maintaining the Resource Plan

Resource allocation converts a fee into a staffing commitment over time, and it is maintained continuously rather than set once.

Step 1 — Convert Fee to Hours by Phase

Take the net architectural fee, apply the phase fee allocation, and divide each phase budget by the blended hourly rate planned for that phase. Production-heavy phases carry a lower blended rate than schematic design, because the staff mix shifts toward technical staff.

Step 2 — Spread Hours Across the Calendar

Distribute each phase's hours across its duration. The result is a monthly hour demand curve, which almost never comes out flat — construction documents typically produce a sharp peak.

Step 3 — Level the Peaks

Resource leveling smooths demand against available capacity. The available levers, in order of cost:

1. Shift non-critical tasks into adjacent months using their float.
2. Re-sequence work packages so independent packages run when capacity exists.
3. Reassign within the firm from projects that are in a trough.
4. Add temporary capacity — contract staff or outsourced production.
5. Authorize overtime, which is the most expensive lever for the firm because uncompensated overtime destroys margin and compensated overtime exceeds the fee plan.

Step 4 — Monitor and Re-forecast

Compare actual hours charged against budgeted hours at every reporting cycle. A phase that is 70% through its hours at 50% completion will not recover by working harder; it needs scope, staffing, or an additional-services conversation now, not at 100%.

Exam Tip: Distinguish the three rates in a resource item. Direct personnel expense is what the person costs. The billing rate is what the client pays. The blended rate is the weighted average across the staff mix planned for a phase. Items that swap one for another are testing whether you know which number belongs in which calculation.