We frequently get ask to cost justify our recommendations. Interestingly, it does not always cost more. Take the case of developing a User Interface Style Guide.
System development needs design decisions.
There is no reason why good design decisions made using the guide should be any more expensive than the normal ad hoc design decisions for user interfaces. Indeed in most cases, there are savings in time and effort required because some design decisions have already been made. Additional benefits of adopting an in-house style guide include improved consistency of user interfaces which in turn reduces user errors and learning times. Increased consistency is also likely to increase the acceptance and hence the utilisation of new systems. The re-use of design components from the design library also contributes to savings in resource.