I have a CPFF Contract that was competitively awarded. During the proposal phase some items identified in the spec as optional which others identified as required. My company won with our proposal clearly not including one of the optional specifications. During kick-off, our customer's customer strongly suggested that the optional specification we decided not to include should be included in our product. PM to PM, the decision was made to make it happen. I found out later and sent notification to the KO that this was being requested and asked for concurrence, explaining that this would be