Cost loading and resource loading terms are widely used in project planning. Project managers need resource and cost loaded work schedules to make realistic assumptions and forecasts for their project’s targets. However most of the work schedules are not resource and cost loaded. This means that material, labor and non labor resources and their budgeted quantities are not assigned to the activities consequently project managers can not prepare long term and short term plans effectively due to the lack of information. A well prepared and resource and cost loaded schedule provides adequate project information and improves decision making within the project team. Oracle Primavera P6 Cost Loading feature enables to monitor planned and actual costs and expenses of a project. Long term and short term paymet plans can be made, cash needs can be calculated by the help of this feature. Labor, subcontractor and vendor payments can be planned based on the production rates. This Primavera P6 tutorial demonstrates how to create primavera p6 cost loading histogram.
In a work schedule, cost loading represents either income or expense. Most of the clients require that the total contract amount (Schedule of Values) be allocated across the activities of the project schedule. This can be considered as cost loading. For the client, this is the cost to complete an activity and for the contractor this is the income will be received.
From the contractor’s point of view cost loading represents direct, indirect costs and expenses. A direct cost is a price that can be utterly attributed to the production of products or services. Some costs, such as direct materials, direct labor, equipments are common direct costs.
Indirect costs are those which effect the whole company such as depreciation, accounting services, general supplies, board salaries. They are not just only one product. Overhead costs, ongoing costs are indirect costs.
An expense consists of the economic costs a business incurs through its operations to earn revenue. Businesses are allowed to write off tax-deductible expenses on their income tax returns to lower their taxable income and thus their tax liability .
Primavera P6 Cost Loading
The figure below (Figure 1) shows a sample project. The duration type of the activities is Fixed Duration & Units. First step is to create resources in the Primavera P6 Resources Library and define the unit prices.
Select Enterprise | Resources from the main drop down menu at the top of the screen. This will display the Resources view in the Figure 2.
Then click “Add” button and create a labor resource. Insert 10 $/hour as the unit price, Figure 3.
Now, assign this newly created Manhour resource and insert budgeted manhour for each of the activities. When you insert budgeted quantity, you will see that budgeted costs are calculated by multiplying the unit price and the quantity, Figure 4.
Original lag can be used to shift the cost or resource distribution of the activity. It can be either positive or negative. Resource curves are used to model the resource or cost loading of an activity within the schedule. Resource curves can be linear, back loaded, front loaded, trapezoidal, triangular etc. If you don’t know how to use resource curves, please read this article from here.
Once a schedule has been created, resources are assigned, budgeted units are inserted, you begin the process of tracking progress. In order to see the cost loading of an activity or all the activities, Select View | Show on Top | Activity Usage Spreadsheet from the main drop down menu at the top of the screen. Then, customize the spreadsheet by clicking on and select Budgeted Labor Cost, Figure 5.
If you change the resource curve and/or original lag, time distributed data will change.
In order to see the cost loading histogram, Select View | Show on Bottom | Activity Usage Profile from the main drop down menu at the top of the screen, Figure 6.
A work schedule is the main tool for performing project control activities within a project. If it is done well, project manager and the project team can monitor the real status of their projects.
Integrating cost and schedule systems can both eliminate surprises and dramatically improve efficiency and effectiveness of decision making for a project or even a portfolio of projects.  This integration gives a chance to manage and optimize resources and costs of the project.
Primavera P6 cost loading curves and histograms are used to monitor the planned and the actual costs and expenses of a project. It is possible to create several types of reports by gathering datas from the Primavera P6 spreadsheets and/or histograms.
 Investopedia “What is an Expense ?”
 Koster, K. (2011). What your schedule isn’t telling you. Paper presented at PMI® Global Congress 2011—North America, Dallas, TX. Newtown Square, PA: Project Management Institute.