In conducting the survey, a number of restrictions have become evident, which need to be factored into any conclusions drawn from the data as follows:
■ Some difficulties arose in identifying contact details of all the ALT members, especially where these projects have been completed for a number of years.
■ Where only one response has been received for an individual project, it is difficult to ensure the integrity of the data without further corroborating data sets.
■ Where more than one response has been received from an alliance, all responses been used in the analysis of the data.
■ Some of the responses to the questionnaire were incomplete. Where only one incomplete response has been provided, the study team at their discretion decided whether or not there was sufficient data to include the response. Where multiple responses were received for an alliance, only those that were complete or sufficiently complete were used.