If you could determine the return on investment (ROI) of the new computer equipment it would be easy to make a decision, unfortunately, this is a difficult task. For example, what is the ROI of a fire extinguisher? If you never use the fire extinguisher your return on the investment is low. If the first extinguisher puts out a fire that could destroy the entire building then its ROI is very high.
1) Why is it so difficult to determine the ROI of the components in your enterprise architecture?
2) What can you do to determine the cost/benefit or ROI of the proposed dishwasher safe keyboard and mice for a cafe?