Many approaches to SPI are draconian at best. They offer very little ROI at astronomical expense. Don't expect to find a silver bullet, especially among 20th century approaches to SPI. And don't put all of your eggs in one basket . Try a diversified approach. Research, analyze, and experiment with a variety of methods that offer a generous ROI of SPI at a nominal expense. Don't use a SPI method just because everyone else is doing it.
A new fad is born every year, often fueled by the unbridled enthusiasm of a new generation of computer programmers. Don't get swept up in youthful enthusiasm . Worse yet, don't be fooled by untested bureaucratic models from industry bodies and government research centers. Instead, responsibly steward your resources toward key SPI methods which offer a proven ROI.