Parallel Implementation

<aside> 💡 Organisations can introduce systems that can be run in parallel with each other. This means users can choose either system to work with and can learn the new system at their own pace.

</aside>

✅ Advantages

• Users can learn the system at their own pace
• Users can give any feedback that could result in final changes
• If the new system crashes completely, there will be an alternative

❌ Disadvantages

• Some processes are linear and need everyone to be using the same system
• Hardware may not be able to cope with the additional load of 2 systems running concurrently
• The system has to be changed over and people may get stubborn about not using the new system and still have the BIG bang change

Phased Changeover

<aside> 💡 Modular - users will have to slowly get used to the new modules of the system, forcing them to gradually learn the new system without being overwhelmed

</aside>

✅ Advantages

• Allows users to get used to the system gradually
• Can take a long time with the developers having to be paid for the additional time frame

❌ Disadvantages

• The new system has to be modular and fully integrated with the old system
• Users may get frustrated with having to combine 2 different systems

Big Bang - Direct