Kurt Wehrle says, Whether you call Product Portfolio Management Product lifecycle, stage gate, or Explore, Exploit, Sustain, Deletion, it is all about categorizing all of your products into groups, so that you can compare like products to like products, and make sure that they are getting an appropriate level of resource investment. To make this happen, the Product Portfolio Manager makes sure that a company is allocating resources optimally across the product development and management lifecycles, as well as keeping an ear out for areas where products need to improve.