If you add a new employee to the project, does the amount of work increase?

Question

Project management

Foreword

We were given the task of making minor changes. Management had expectations - X hours to complete. Only completed half of the job in 2X hours. It feels like the smaller the edits, the bigger the gap between expected and actual execution time. And this is not the first time we have had this situation.

The main content of the question

In the title of the question is an approximate formulation of the paradox, which I heard in one of Sergei Nemchinsky's videos. To clarify the topic, you can answer the following sub-questions:

• Who is this statement named after?
  
• If this statement is true, under what conditions and why?
  

Answer 1

1. There is a period of adaptation of an employee when he does not bring direct or significant benefit, but the time of colleagues is spent on his immersion
2. Waste of time switching between tasks (switching context)
3. Poor management, limited to time estimation based solely on the time for implementation
4. Lack of reestimation processes

Answer 2

When you do everything yourself, there is no need for detailed explanations and control for the task.
Hence, saving time on management.