Answer:
All sustainable businesses work on this basic business model:
1) Take something at a cost of "A" (lets call it the input), then
2) Do something with that input at a cost of "B", to
3) Produce something better (or different) to sell at a cost of "C".
For the business to be sustainable, "C" must be greater than "A"+"B".
In the broadest sense, SAP can be defined is a suite of computer programs all bundled together, which give the business - any business - the capability of doing step 2 (above) better than their competitors.