We plan to design a power adapter. Which relationship (Containment/Satisfy/Verify/Refine/Derive Requirement/Copy/Trace) will I use in the following situations?

1. Requirement A is specified as “the power adapter must be slim.” Since this requirement is too abstract, I define a new requirement as “the height of the power adapter must be less than 2 inches” to make Requirement A clearer.

2. I defined a test case. This test case can help us verify Requirement B specified as “the power adapter must be able to plug/unplug for more than 1,000 times without any issue”.

3. Requirement C (“The power adapter must be power efficient”) can be decomposed into two sub-requirements. One requirement is for the converter’s efficiency and the other requirement is for the power loss rate.

4. I would like to reuse Requirement A to my other engineering design projects.

5. I designed a slim power adapter. This power adapter should be able to meet the requirement A.

6. To meet Requirement A (“Slim power adapter”), I will need to have Requirement D specified as “The power adapter will not be overheated after using for more than 10 hours.”

7. I created a state machine. There is no clear relationship from it to Requirement E but I would like to keep it for the later design stage.