Consumed activities

Activities that have a homogenous level of service between each instance of an activity are termed consumed activities. The seven core+ activities considered to be consumed are:

·         doctors

·         hospitals

·         primary schools

·         secondary schools

·         further education

·         convenience stores

·         supermarkets.

For these activities the (λ) parameters for each path were added using a harmonic series. This weights each additional instance of an opportunity less than those preceding it, accounting for the decreasing value of each instance of an activity as the size of the pool of providers to choose from increases. The value of the indicator is a number greater than zero if accessibility exists. A value of 1 shows a high degree of connection between the origin and destination showing they are effectively co-located adjacent to the origin. This does not necessarily mean the activity is co-located, rather it may mean that two, three or more activities are closely located, which in equivalent terms means the activity is ‘next to’ the origin.

A score of zero means no access and a score of one is the equivalent of one destination located next door. Having only one destination with a score of 0.9 is equivalent to a choice three equidistant destinations each with scores of 0.5. The score can exceed one, but in practice rarely exceeds about three.