The fruit of thy labours.  Inversed: choose your battles wisely if you're inclined to qualify existence.

Put another way: What you get back after putting effort and money into a task.

An important concept here is the ''total'' ROI for a task.  Often, someone will see a neat toy, recognize some way in which it will help them, but will fail to properly assess its total ROI.  A library that gives you some trivial bit of functionality but is extremely expensive and difficult to install and implement isn't worth it.  It has a bad return on investment.


'''ROI in Commercial Software Design'''

ROI is an important factor when designing commercial software. The customer should get some return on their investment in a product. You could be providing a really neat tool to a user but it needs to have a well rationalized ValueProposition to the customer. It's important to note that a high TotalCostOfOwnership (TCO) could make a ROI proposition moot.


See also 
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CategoryEconomics,