System testing is basically a part of software testing and test plan should always contain specific space for this testing. To test the system as a whole, requirements and expectations should be clear and the tester needs to understand real time usage of application too.
The city of Milwaukee, Wisconsin was chosen as the location in which Happy Days was set. Tom Miller, one of the producers, grew up in Milwaukee. In addition, Milwaukee gave the show a midwest flavor that they thought would appeal to a broad-based audience.
The end of 1981 was a difficult time for Happy Days. Ron Howard finally decided he had enough of the guest spots and decided that the season finale would be the final Ritchie episode. Ritchie, now out of the service, returns to Milwaukee to collect his wife and child and go to California to pursue a writing career.