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Cost Estimation and Budgeting. Chapter 8. © 2007 Pearson Education. Common Sources of Project Cost. Labor Materials Subcontractors Equipment & facilities Travel. Types of Costs. Direct Vs. Indirect Recurring Vs. Nonrecurring Fixed Vs. Variable Normal Vs. Expedited. Expedited.

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Cost estimation and budgeting

Cost Estimation and Budgeting

Chapter 8

© 2007 Pearson Education


Common sources of project cost
Common Sources of Project Cost

  • Labor

  • Materials

  • Subcontractors

  • Equipment & facilities

  • Travel


Types of costs
Types of Costs

  • Direct Vs. Indirect

  • Recurring Vs. Nonrecurring

  • Fixed Vs. Variable

  • Normal Vs. Expedited


Cost classifications

Expedited

Recurring

Variable

Normal

Indirect

Direct

Fixed

Costs

Cost Classifications

Non-recurring


Cost estimation
Cost Estimation

  • Ballpark (order of magnitude) ±30%

  • Comparative ±15%

  • Feasibility ±10%

  • Definitive ±5%


Learning curves
Learning Curves

Each doubling of output results in a reduction in time to perform the last iteration.


Problems with cost estimation
Problems with Cost Estimation

  • Low initial estimates

  • Unexpected technical difficulties

  • Lack of definition

  • Specification changes

  • External factors


Creating a project budget

WBS

Project Plan

Scheduling

Budgeting

Creating a Project Budget

The budget is a plan that identifies the resources, goals and schedule that allows a firm to achieve those goals

  • Top-down

  • Bottom-up

  • Activity-based costing (ABC)


Activity based costing
Activity-Based Costing

Projects use activities & activities use resources

  • Assign costs to activities that use resources

  • Identify cost drivers associated with this activity

  • Compute a cost rate per cost driver unit or transaction

  • Multiply the cost driver rate times the volume of cost driver units used by the project


Budget contingencies
Budget Contingencies

The allocation of extra funds to cover uncertainties and improve the chance of finishing on time.

Contingencies are needed because

Project scope may change

Murphy’s Law is present

Cost estimation must anticipate interaction costs

Normal conditions are rarely encountered


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