My brother has problems with his business and he wants to improve it. Solutions?

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Hello, I will be very brief, my brother is trying to improve the efficiency of his company and reduce costs, but he has encountered several obstacles along the way. In particular, it has trouble identifying areas where improvements and optimizations can be made.
You have tried to fix the problem on your own, but I have not found any effective solution. You are concerned that you may not be making the most of the resources you have and that this is negatively affecting your business.
Is there any recommendation you can suggest to solve this problem?