>First - don't trust McKinsey or any consultants to implement anything unless it's been done before and clear. They're smart people who make slides. Sometimes t

>First - don't trust McKinsey or any consultants to implement anything unless it's been done before and clear. They're smart people who make slides. Sometimes they have specific knowledge. This! These 'management consultancy' firms are essentially programming libraries in real life: they recycle and reuse proven methods from other companies (that they worked for) and use it at yours so you don't have to reinvent the wheel. Don't hire consultants for something your organisation can (and should!) do itself and don't ask them for advise on something that can't be realistically quantified in excel. And watch out for managers using consultancy firms to outsource decision making.