4 Project Resources and Budgeting

Plan resources around the work

Project resources include people, equipment, materials, facilities, services, and funds required to complete the work. Resource planning and budgeting translate planned work into an achievable staffing and funding plan. They are connected: changes to the schedule, staffing, or work can change expected costs.

Plan resources alongside scope, schedule, funding, and cost performance throughout the project. Begin with defined deliverables and activities, often organized in a work breakdown structure (WBS). For each activity, establish what is needed, how much is needed, when it is needed and for how long, who will provide or approve it, and whether it will be available when scheduled.

A responsibility matrix clarifies who performs, approves, advises on, or receives information about work items. A resource calendar records availability, such as staff assignments, equipment reservations, holidays, and supplier lead times. These tools can reveal conflicts, such as one specialist being assigned to two critical tasks at the same time.

Resolve availability gaps

Compare the capacity required by the plan with actual availability. When demand exceeds capacity, possible responses include adjusting task sequence or timing, reassigning work, training staff, acquiring equipment, or contracting for services. Record the assumptions behind the plan and revise it when approved changes affect the work.

Resource availability and changes can affect cost, schedule, requirements, and risk. For this reason, resource plans need to be reviewed as the project changes rather than treated as fixed once created.

Estimate project costs

A cost estimate is a reasoned forecast of what planned work is likely to cost. Base it on a defined scope, schedule, assumptions, and supporting data—not simply on the amount of money available. Link the estimate to the technical baseline and WBS, document assumptions and data, analyze risk and sensitivity, and update estimates using actual costs.

Common methods suit different kinds of information:

• Analogous estimating: Start with the cost of a similar completed project and adjust for differences.

• Parametric estimating: Apply a cost rate to a measurable quantity, such as a cost per installed unit.

• Bottom-up estimating: Estimate individual activities or work packages, then add them together. This can provide detail, but depends on the quality of the underlying plan.

• Three-point estimating: Consider optimistic, most likely, and pessimistic costs to represent uncertainty. A commonly used weighted estimate is $\frac{O + 4M + P}{6}$, where $O$, $M$, and $P$ are the optimistic, most likely, and pessimistic estimates, respectively.

Include relevant direct costs, such as labor, materials, travel, equipment, and vendor services, as well as applicable indirect costs, such as overhead, using consistent rates. State the currency, price basis, and assumptions about inflation or other cost changes when they matter. Avoid counting the same cost twice. Estimates should become more detailed as the work and its assumptions become clearer.

Combine estimates into a total

A software rollout provides an example of combining estimated labor and other costs. It is estimated to require $240$ developer hours at $\$70$ per hour, $60$ design hours at $\$80$, $80$ testing hours at $\$55$, and $\$2{,}000$ for licenses and training:

• Development: $240 \times \$70 = \$16{,}800$

• Design: $60 \times \$80 = \$4{,}800$

• Testing: $80 \times \$55 = \$4{,}400$

• Licenses and training: $\$2{,}000$

The resulting estimated cost is $\$28{,}000$. These are planning estimates, and actual costs may differ.

Develop and authorize the budget

A budget allocates funding to planned work over time. Develop it by estimating the project’s work packages, assigning costs to the activities and periods in which they are expected to occur, and reviewing the schedule and funding profile together. This review checks that funds will be available when needed.

Identify uncertainty and decide what reserves are appropriate under the organization’s rules. Obtain approval and record the authorized cost baseline and any additional authorized reserves separately. Document what each reserve includes and who may approve its use, because organizations may define reserve terms differently.

For example, if the $\$28{,}000$ estimate receives an illustrative $\$2{,}800$ contingency reserve for identified uncertainties, the cost baseline is $\$30{,}800$. A further $\$2{,}000$ management reserve, if authorized, makes the total authorized budget $\$32{,}800$. These amounts illustrate one case; reserve amounts should reflect uncertainty and risk, not an automatic percentage.

Monitor costs and update forecasts

After approval, use the budget as a control baseline, not as a reason to ignore new information. At regular intervals, track actual spending and work completed against the plan. Forecast the total cost at completion using actual costs plus the expected cost of remaining work.

Explain material differences, such as extra labor, late procurement, or approved scope changes, and obtain authorization before changing the baseline. A regular review can check whether resources are available when scheduled, spending is consistent with work completed, a risk or change has altered the forecast, and funding will arrive in time.

Resource management includes time-phased cost planning, comparing actual performance with the budget, and regular cost forecasting. Earned value management is one approach for integrating scope, schedule, and cost performance.