-	Cost effectiveness:
ACB should customise an existing software like MYOB, by doing so, at the cost of some man-hours they can create a cost-effective long term software, as well as this it is better to customise the existing software, because that allows for cheap future customisations.
-	Benefits
The developers benefit because there is a large range of applications and many different users can use it and thus there are more people to buy the product and thus more money.
It’s good for users because it means that they can create and customise the product to suit their own needs.
-	CASE tools
Computer aided software engineering
A case tool is a tool on the computer which assists a user to engineer software for example a compiler.
-	Defining and understanding	A tool like visio which does flow charts
-	Planning and design	Development program i.e. python
-	Implementing	Data dictionary
-	Testing	There are case tools to automatically test data, i.e. win runner and load runner
-	Maintenance	Documentation tools
Monitor version tools