What happens when an existing system is replaced?
By Eleanor Gray
What happens when an existing system is replaced?
When existing systems are being completely replaced, organizational processes might also have to change, which makes it harder for people to accept a new system. The change in business processes, change in the software system, and learning curve of a new system can disrupt current operations.
What are the requirements for a replacement system?
For replacement systems, you also need to be wary of carrying forward all of the requirements, because some of the old functionality probably should not be migrated. One of the major issues in replacement projects is validating that the reasons for the replacement are sound. There need to be justifiable business objectives for the change.
How to develop requirements for enhancement and replacement?
In replacement system projects, you need to understand all of the desired functionality, just as you do on any new development project. Study the user interface of the existing system to identify candidate functionality for the new system. Examine existing system interfaces to determine what data is exchanged between systems today.
How to write use cases for replacement systems?
You might write use cases or user stories that span the new and existing functionality. In replacement system projects, you need to understand all of the desired functionality, just as you do on any new development project. Study the user interface of the existing system to identify candidate functionality for the new system.
For replacement systems, you also need to be wary of carrying forward all of the requirements, because some of the old functionality probably should not be migrated. One of the major issues in replacement projects is validating that the reasons for the replacement are sound. There need to be justifiable business objectives for the change.
When existing systems are being completely replaced, organizational processes might also have to change, which makes it harder for people to accept a new system. The change in business processes, change in the software system, and learning curve of a new system can disrupt current operations.
What do you need to know before replacing your control system?
Once the decision is made to replace an existing DCS, the next step is implementation, which requires careful planning. When the decision is made to replace a DCS, the new automation system will be a modern DCS, PLC-based system, or PAC-based system.
In replacement system projects, you need to understand all of the desired functionality, just as you do on any new development project. Study the user interface of the existing system to identify candidate functionality for the new system. Examine existing system interfaces to determine what data is exchanged between systems today.
