What criteria do you use to evaluate the successful completion of a task?

To assess the successful completion of a task, I usually use the following criteria:

• Compliance with requirements: the task is completed in full according to the technical specifications or description.
• Correctness of operation: the code or functionality works without errors and failures.
• Performance: the solution operates efficiently, without unnecessary resource consumption.
• Readability and maintainability of the code: the code is written clearly, with comments and structure that allow for easy maintenance and extension.
• Tests: presence and successful passing of unit tests or other types of testing.
• Meeting deadlines: the task is completed within the agreed timeframe.

For example, if I write a function in Python, I will check that it returns the correct result for different input data, is covered by tests, and the code is written in accordance with PEP8.