IN THE WORLD of business, if you don't have an opinion, one thing is certain: you won't get very far. Whatever your role, be it employee, supplier, service provider or adviser, whoever is paying you will expect value for money and, in their eyes, that will include ideas, suggestions and clear evidence that your grey matter has been fully engaged. Previous business generations largely favoured the command-and-control model. Rigid hierarchies determined which people in an organisation or a working partnership were expected to do the thinking and whose role was more or less just to follow instructions.