When the phrase we focus on producing value for the customer is used, there is a concept missing. Most customers need or expect that value to arrive on-time and over-time. In other words receiving the value from the project all at once is actually rare and some times undesired.
A cute Einstein quote is when asked what is the purpose of time his response was "The only reason for time is so that everything doesn't happen at once." - Albert Einstein.
This may sound odd and even counter to good project management. So let's look at the picture below.