The previously used workflow uses a special identifier in the database, but once a position change occurs, the previous procedure cannot be used.
For example: the original system is this
1, employee application.
2. Manager review.
3. General manager review.
4. The chairman's review.
But suddenly the company plans to lay off employees and lay off all general managers, so the original system will become unusable.
Advantages of workflow
Workflow can be changed after the business process, the program code does not need to be changed, and still realize the original function.