Introduction to system engineering

8.4 Under the subsection Program Risks (p. 215), five examples are listed of conditions that may result in a significant probability of program failure. For each example, explain briefly what consequences of the condition may lead to a program failure.

9.8 Perform a trade study on choosing a new car. Identify four alternatives,

between three and five criteria, and collect the necessary information


7.9 a. Develop a set of operational requirements for a simple lawn tractor. Limit yourself to no more than 15 operational requirements.

7.9.b. Develop a set of performance requirements for the same lawn tractor.

7.9.d. How would you go about validating the requirements in (b)?

Operational Requirements

Define the operational conditions or properties that are required for the system to operate or exist. This type of requirement includes: human factors, ergonomics, availability, maintainability, reliability, and security.

Performance Requirements

Define quantitatively the extent, or how well, and under what conditions a function or task is to be performed (e.g. rates, velocities). These are quantitative requirements of system performance and are verifiable individually. Note that there may be more than one performance requirement associated with a single function, functional requirement, or task.