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Table 3

Results based on different criteria for models comparison (TS model  =  our approach, MA model  =  Memetic Algorithm model by Ramli (2004) and HG model  =  manual approach).

Criteria Measurements TS model MA model HG model
Coverage 1. Minimum coverage requirement met. Yes Yes Yes
  2. Balanced coverage provided. Moderate Moderate No
Quality 1. Equalization of night shift rotation among staff. Fair Fair Fair
  2. Equalization of other shifts distribu- tions in particular period. Moderate Moderate Not fair
  3. Violation of not more than six days work stretch. No No Yes
  4. Violation of circadian ordering. No No Yes
  5. Existence of single day work stretch. No No Yes
  6. Ability to assign public holidays in their designated week or the follow- ing week. Yes Yes No
Flexibility 1. Adapting to change in staffing level. Easy Easy Moderate
  2. Privilege to have choice in selecting final roster as wanted Yes Yes No
Cost 1. The required to construct a roster About 1 minute About 12 minutes 3-8 hours
  2. Category of staff required to con- struct the roster Any senior staff Any senior staff Head nurse/ Assistant

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