Hi there,
You have to think about this in a structured way. Think about a couple of ways to breakdown costs and revenues - and then go through them one by one to see which apply.
I won't go into a lot of detail (you can breakdown this further, particularly using the other coaches suggestions) but I'll give you the example.
So in type of costs you have:
- Labor (branches, back office FTE): you need less people for commercial activities (by automating part of the sales process; e.g. customer contact; contracts; etc) or for administrative activities (either by automation or error reduction)
- Rent (branches, central buildings Real Estate): you need less RE related to the previous point
- Travelling: e.g. you don't need to meet the customer to sign a contract (or better remote meeting tools)
- IT direct costs: think about the previous mentioned costs when considering the IT function itself (labor, RE, software licences is usually quite relevant)
- Utilities (telco, water, energy, mail)
- Other costs (security, insurance, office supplies, marketing)
- Financing costs: unlikely - but remember that fewer mistakes may reduce this
Revenues:
- Use Market Share perspective: Number of customers x Number of products x Frequency of Purchase: my expectation here is that a better system should lead to customers using more your bank (e.g. paying more transaction fees)
- You can also use a "churn" or "loyalty" (i.e. less customers leaving the bank, leading to higher retention).
Remember, while knowing how an industry works may help in doing this lists, what is being tested is your ability to THINK IN A STRUCTURED WAY.
(edited)