7.	Manny’s Manufacturing must decide whether to build or buy a software package to keep track of its inventories. Manny’s computer experts estimate that it will cost $325,000 to buy the necessary programs. To build the programs in-house, programmers will cost $5000 each per month. What factors should Manny consider in making his decision? When is it better to build? To buy?
8.	Brooks says that adding people to a late project makes it even later (Brooks 1975).Some schedule-estimation techniques seem to indicate that adding people to a project can shorten development time. Is this a contradiction? Why or not?
9.	Many studies indicate that two of the major reason that a project is late is changing of requirements (called requirements volatility or instability) and employee turnover. Review the cost model discussed in this chapter, plus any you may use on your job, and determine which models have cost factors that reflect the effect of this reason.
10.	Explain why it takes longer to develop a utility program than an applications program and longer still to develop a system program. 
11.	Even on your student projects, there are many significant risks to your finishing the project on time. Analyze a student software development and list the risks. What is the risk exposure? What technique can you use to mitigate each risk?
12.	Many project managers plan their schedule based on programmer productivity on past projects. This productivity is often measured in terms of unit of size per unit of time. For example, an organization may produce 300 lines of code per day or 1200 application points per month. Is it possible to measure productivity in this way? Discuss the measurement of productivity in term of the following issues