To make project objectives more concrete, it can be useful to make an objective tree. Such a tree is a breakdown of general objectives into more specific sub-objectives and solution directions. The tree can be built up in a workshop with decision makers (see page 107) by asking simple questions like: What do you mean with that? Are there any sub-objectives? And how can these objectives be realized? Reading the tree from left to right should answer how questions, from right to left the why questions.