Sun Zi said: If one makes a thorough analysis and reveals a high chance of winning, he will win.

孫子曰：多算勝，少算不勝，而況無算乎！吾以此觀之，勝負見矣。

Sun Zi said:
If one makes a thorough analysis and reveals a high chance of winning, he will win. If he does not make a good analysis or his analysis reveals a low chance of winning, he will likely lose. What is more to say about one who does not make any analysis or his analysis reveals no chance of victory?
Based on these observations, we can foretell the winning party.

Parallel to Project Management
This section reinforces the importance of performing an appropriate analysis before starting the actual project. If the analysis suggests that the project is still feasible, then if we manage the project well, there is a high chance that we will make the project successful and derive the intended benefits. If on the other hand, we find the project too risky or infeasible, there is no point continuing the project since it will usually turn out to be true as we proceed. But what can we say if no such analysis is performed before the project is started?

Based on observing how an organization and the project manager starts a project and whether or not they perform an analysis prior to starting the project, we can judge whether they are good at managing projects and likely to succeed most of the time or not.