How Schedule "Should" Effect the Project Budget
Talking with a lot of project managers I find that many of them understand the challenges of the triple constraint. Schedule, budget, and scope all need to be tracked and managed. But, many of them do not understand the direct link between schedule and budget. Many project managers feel that a schedule slip is okay as long as the customer agrees to the delay or if there is no missed opportunity.
“We met with the customer and they understand the situation and have agreed to
move the expected delivery date out one year.”
“Our competitors will not have these features in their product for
another two years. Even with a one year slip we will still be ahead of them by
six months.”
These points are valid points and the focus on the customer is very important when facing a potential schedule slip, but the financial implications for these delays need to be understood before moving forward with the new plan. Many times, delayed deliveries imply delayed revenue. Let’s say your customer has agreed to pay after the final delivery or sales are expected to start increasing after the new features have been added to the next release of the product. Even if the project has stayed within budget, the schedule slip might affect the success of the project in terms of the project’s net profits.
First, understand that a project is only undertaken when management feels the project will add value to the business (short-term or long-term). The completion of the project is expected to increase sales by 5% or the customer will pay $5 million for the final delivery. Schedule, costs, expected returns, and the required profits are all considered when calculating the success of the project. Changing the schedule will affect the required budget. A delayed schedule may require a smaller budget if for the project to still add value to the business. Take for example the following project.
A project is expected to last four years and is given a budget of $3.5 million over four years. The project will cost $120k in 2007, $1 millions in 2008 and in 2009, and $1.3 million in 2010. Added revenue is expected to be about $5 Million by the end of 2011.
Let’s say the cost of capital for the project is 15%. The expected Net Present Value (NPV) comes to $258,286. Great! A positive value means a positive growth for the business.
Now let’s say the project is expected to slip by one year. In most cases this would also impact the costs, but for this example we’ll assume the cost originally expected to occur in 2010 can be spread out over 2010 and 2011 ($700k in 2010 and $600k in 2011) thus keeping within the original $3.5 million budget.
This schedule slip changes the NPV to a loss of $63k! The project now reduces the value of the business!
What I want project managers to understand is that schedule is tied to the budget. Just because the customer is okay with your slip, you still need to make sure the project makes sense to the value of your business.


