Lab4
Probelm1: A software development organization currently employs 96 software professionals,
including 19 managers, all of whom develop as well as test software. The latest figures show that
27 percent of their time is spent on testing activities. The average annual cost to the company of a
manager is $144,000, whereas nonmanagerial professionals cost $107,000 a year on average; both
figures include overhead. Use cost-benefit analysis to determine whether a separate SQA group
should be set up within the organization.
Solution1：If the organization is restructured so that 26 professionals, including five
managers, are concerned solely with SQA, increased productivity and product quality
can be expected. The costs to the company will include reorganization time (two
day’s labor, approximately 77 $825 + 19 $1,100, or about $84,500) and training
time and costs for the five SQA managers (perhaps $75,000). The total cost of under
$160,000 should be recouped in a year even if productivity increases by only 3%.
Problem2: Repeat the cost-benefit analysis of Problem1 for a firm with only seven software
professionals, including two managers. Assume that the other figures remain unchanged.
Solution2：Suppose that product development is done by five professionals including
one manager, whereas SQA is done by the other two professionals including the other
manager. Reorganization costs are now about $6,350 (that is, less than one tenth of
the costs for Problem 6.2), and training costs for only one manager are about $15,000.
Again the total cost should soon be recouped.
Problem3: You are the SQA manager at Hardy Hardware, a regional chain of 754 hardware stores.
Your organization is considering buying a stock-control package for use throughout the
organization. Before authorizing the purchase of the package, you decide to test it thoroughly.
What properties of the package do you investigate?
Solution3：Utility: Is it easy to use? How much training is needed for the package to
be used effectively? How easy is the documentation to understand? Is the product
reasonably priced compared to similar products on the market? Does it have all the
needed features?
Reliability: How frequently does the product fail? What are the results of such a
failure, and how easy is it to resume work?
Robustness: How does the product react to invalid input data? What happens if the
