13.4. LOGIC DIAGRAMS/NETWORKS

Probably the most difficult figure to construct is the logic diagram. Logic diagrams are developed to illustrate the inductive and deductive reasoning necessary to achieve some objective within a given time frame. The major difficulty in developing logic diagrams is the inability to answer such key questions as: What happens if something goes wrong? Can I quantify any part of the diagram's major elements?

Logic diagrams are constructed similarly to bar charts on the supposition that nothing will go wrong and are usually accompanied by detailed questions, possibly in a checklist format, that require answering. The following questions would be representative of those asked for an R&D project: