Explanation of guide words

The basic meaning of the guide words in Table 9.7. The meaning of the words No/Not, More and Less are easily understood the No/Not, More and Less could, for example, refer to flow, pressure, temperature, level and viscosity. All circumstances leading to No flow should be considered, including reverse flow. 

The other words need some further explanation  

As well as something in addition to the design intention such as, impurities, side-reactions, ingress of air, extra phases present. 

Part of something missing, only part of the intention realized such as, the change in composition of a stream, a missing component. 

Reverse the reverse of, or opposite to, the design intention. This could mean reverse flow if the intention was to transfer material. For a reaction, it could mean the reverse reaction. In heat transfer, it could mean the transfer of heat in the opposite direction to what was intended. 

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