Distribution of 100 percentage points: stakeholders distributed 100 percentage points between categories according to their relative importance. The evaluators subsequently calculated the arithmetic mean to obtain an ‘average stakeholder view’
ii.
Ranking method: Stakeholders assigned the most important category a value of 10 and the other categories appropriate relative rankings on the scale 0–10. Based on this ranking, the evaluators subsequently calculated the weights and took the arithmetic mean to obtain an ‘average stakeholder view’
iii.
Pairwise comparisons: Thurstone's conjugate comparison method was used to collect the pairwise preferences of the stakeholders individually ( Thurstone, 1927) and the final weights were calculated using the Guilford method (Guilford, 1936)
iv.
Consensus building: Stakeholders initially defined their own weights (through distribution of percentage points or ranking) and then through facilitated, constructive discussion, a group consensus was agreed as initial opinions were modified.