Software Engineering note-man-month myth

The main cause of Project lagging lies in the lack of reasonable schedule. It has a greater impact than all other factors.

• First, we lack effective research on Estimation Technology, which reflects an unrealistic assumption that everything will work well.
• The estimation technology we use implicitly assumes that people and months can be exchanged, and mistakenly obfuscated the progress and workload.
• Lack of confidence in estimation, usually not very patient and continuous estimation of this work.
• Lack of tracking and supervision over the progress.
• When you realize the progress offset, the subconscious reflection is to increase manpower. This is like a fire suppression of gasoline. It will only make things worse.