What to check
Old interface
Old interface is treated as a separate check point: value, data, effort, control, and error handling need to fit together.
No API
No API is treated as a separate check point: value, data, effort, control, and error handling need to fit together.
Text understanding
Text understanding is treated as a separate check point: value, data, effort, control, and error handling need to fit together.
Exceptions
Exceptions is treated as a separate check point: value, data, effort, control, and error handling need to fit together.
Log
Log is treated as a separate check point: value, data, effort, control, and error handling need to fit together.