How's your experience with consulting companies?

Our company hires Deloitte and McKinsey every now and then and pays them huge amounts of money to do data science projects for us. I'm supposed to understand and take delivery of their work. The problem is what they do seems like scam to me. I try to raise awareness about, but leadership seems not to care too much. Their code is trash, and they manipulate their model performance and present it through fancy slides and well-spoken presenters so that …

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