Situationally dependent.
One of the problems with "good management" practices is the idea that you can write them down and then follow them precisely to predictable successful outcomes. Unfortunately, situations demand very specific strategies - strategies often exactly opposite to similar situations in only slightly different contexts. The good manager is consistently able to correctly analyze the situation and apply the most appropriate management strategy. Knowing all the available strategies is important. Following some rigid guide that suggests that the would be manager can avoid successful analysis by knowing all the management rules is doomed to failure from the start.
