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.
Happy Days spawned the hit television shows Laverne & Shirley and Mork & Mindy as well as three failures, Joanie Loves Chachi, Blansky's Beauties featuring Nancy Walker as Howard's cousin, and Out of the Blue. The show is the basis for the Happy Days musical touring the United States since 2008.