What is Soft Boiled Egg Rule in Software Industry?

An egg is placed in water for around 3 minutes for soft boiling. This term “Soft Boiled Egg Rule” is related to software industry. In the design of application software, software engineers are faced with a challenge of making balance between the performance and user-friendliness of their design. The Soft boiled egg rule says that the system should not be too complicated for a normal user, and the time taken to understand features of the system, or to perform an operation, shouldn’t be too long, and should be preferably less than three minutes.