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un weighting of Barriers and Boosters

This question was posted the Assessment and Surveillance forum area and has 1 replies.

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Bumba Erinest


Normal user

22 Nov 2015, 10:40

I have tried to read about how to weight and unweight barriers and boosters but am confused with the part of un weighting. How exactly is Un weighting done?


CMAM Advisor

Normal user

23 Nov 2015, 04:39

Dear Bumba,
“non-weighted” B&B is one of the four ways of estimating the prior based on the strength of B&B (the others being: histogram, weighted B&B and concept map). The “non-weighted” is the easier one to calculate because it consists in simply counting the number of barriers and the number of boosters, the assumption being that each B & B have the same strength (impact) on coverage (which is unlikely to be true in the reality). For example if you have 20 boosters and 15 barriers, the strength will be of 20 and 15 respectively.

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