Great consideration of necessity for documenting technology decision making. Also, difficulties of culture and mentality changes.

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• Compensatory. This type of decision considers every alternative, analysing all criteria in low-level detail. Criteria with different scores can compensate for each other, hence the name. There are two types here:
  • Compensatory Equal Weight – criteria are scored and totalled for each potential option, the option with the highest total signifies the best decision. 
  • Compensatory Weighted Additive (WADD) – here a weighting is given for a criterion to reflect significance (the higher the weighting, the higher the significance). The weighting is multiplied by the score for each criterion, then each alternative is summed, the highest total winning. 
• Non-Compensatory. This method uses fewer criteria. The two types are:
  • Non-Compensatory Conjunctive – alternatives that cannot meet a criterion are immediately dismissed, the winner is chosen among the survivors. 
  • Non-Compensatory Disjunctive – an alternative is chosen if it complies with a criterion, irrespective of other criteria. 

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Compensatory decisions are suitable when time and resources are available to   

• gather the right set of alternatives, 
• evaluate each alternative in detail
• score each with consistency and precision. 

Non-Compensatory decisions are necessary when

• there is time stress
• the problem is not well structured  
• the information surrounding the problem is incomplete
• criteria cant be expressed numerically
• there are competing goals
• the stakes are high
• there are multiple parties negotiating in the decision.