You might take a look at www.amazon.com/Rapid-Development-Taming-Software-Schedules/dp/1556159005/. Although it's 20 years old, it has some good ideas in it. It's also more about 6-month estimations than 90-minute estimations, though.
You might take a look at www.amazon.com/Rapid-Development-Taming-Software-Schedules/dp/1556159005/. Although it's 20 years old, it has some good ideas in it. It's also more about 6-month estimations than 90-minute estimations, though.