title: Difference between potentially shippable product (PSP) and Minimal Marketable Feature (MMF)
body: <p>PSP is increment, i get in the end of sprint. Something, valuable for client.
  MMF is not the same? I though, is valuable for client too...</p>
  
  <p>Please, help me to understand difference between PSP and MMF</p>
  
  <p>Thanks</p>