We discussed the importance of framing a problem in order to understand the problem better and be able to develop a solution more quickly and easily. In this homework, you are asked to use the different problem frames discussed in class to create a frame diagram for the following software systems;

• Traffic light controller; this system switches lights between red, green, and yellow according to timing rules, activity registered at sensors, and timing relationships with activity at neighboring traffic lights.

• A program that tells a bus rider which buses to take to get from one location to another, arriving by a specified time.

• An electronic email system.

Keep in mind that problem frames can be combined when solving these problems.