The PMI Futurespective is a planning tool designed to examine a topic from multiple perspectives. Participants define the positives (Plus) and negatives (Minus) along with what they find curious (Interesting) about it.
The PMI approach to problem-solving was developed by Edward de Bono. It aims to encourage people to think about a problem in a creative, non-traditional way. De Bono felt that one problem with traditional thinking was that people tended to quickly form an opinion, then focus the rest of their energy on backing it up.
The PMI addresses this by asking everyone to consider the same topic from new perspectives. As such, participants show their intelligence with the range of their input, rather than how well they defend an opinion.
With this in mind, the PMI Futurespective is a very useful tool for agile teams because it forces a broadening view of the project to be considered and they cannot dismiss the variety of inputs that they themselves have put together.