A large government agency wants to contract with a software development firm for a project involving 20,000 lines of code. The Hardand Software Company uses Walston and Felixs estimating technique for determining the number of people required for the time needed to write that much code. How many person-months does Hardand estimate will needed? If the government's estimate of size is 10% too low (i.e., 20,000 lines of code represents only 90% of the actual size), how many additional person-months will be needed? In general, if the government's size estimate is K% too low, by how much must the person-month estimate change?

How many PM? =

10% to low? =

k% to low? =