Consider the Nine Activities That Follow

Consider the nine activities that follow.
1. Microsoft: Developing computer coding for a new spreadsheet package
2. General Mills: Painting the office of a maintenance supervisor at a plant that produces cereal
3. Mayo Clinic: Examining a new patient
4. American Airlines: The 90 minutes that a Boeing 757 sits idle on the ground between flights
5. Office Depot: Moving cases of paper from one location to another in the same warehouse
6. Rolex: Attaching a watch band to the watch's face
7. United States Postal Service: Reprocessing mail that had been sorted incorrectly on a malfunctioning sorting machine.
8. Fidelity Investments: Correcting errors made by company personnel in customer accounts
9. Marriott: Upgrading the quality of bedding used at hotels in very competitive marketplaces
10. Dell Computer: Re-working defective units found during quality control inspection
Required:
Categorize each of the activities as either value-added or non-value-added for the companies noted.