You can fail a project not because you were technically wrong about anything, but because you burned your customer out by taking 6 months instead of 6 weeks to find a viable solution to their problem. Speed is a feature from the perspective of your customers. There is economic value associated with it.
Consider your state of mind when you call the HVAC tech to fix your broken condensing on an August afternoon in Texas. This is how a lot of business leaders feel every day. Speed is the best way to meet uncertainty in complex domains. Unless you are fairly sure you can one shot the problem with a single commit, having a process to iterate with some expediency is important to success.
There is definitely a point where you are going too fast, but the customer will almost certainly let you know when this happens. Let them decide for you how fast is too fast.
Consider your state of mind when you call the HVAC tech to fix your broken condensing on an August afternoon in Texas. This is how a lot of business leaders feel every day. Speed is the best way to meet uncertainty in complex domains. Unless you are fairly sure you can one shot the problem with a single commit, having a process to iterate with some expediency is important to success.
There is definitely a point where you are going too fast, but the customer will almost certainly let you know when this happens. Let them decide for you how fast is too fast.