First of all understanding clients pain areas which requires change is the key to suggest or implement any changes. With that said, I would probably quote an example with a challenges I overcome with my client by implementing a change...ultimately it should drive a good value proposition in terms of $ value or in terms of enhanced cleint satisfaction. Basically, it should have yield tangible or qualitative solid benefits to put a weigtage on the response we provide. Hope it helps to a certain degree. Thx