Table 3 Key implementation outcomes, their definition and theoretical basis

Acceptability

Satisfaction with various aspects of the innovation (e.g. content, complexity, comfort, delivery, and credibility).

Concerning the complexity and relative advantage of the intervention where “Complexity” is a measure of the degree to which an innovation is perceived as difficult to understand and use [54] and relative advantage is The degree to which an innovation is perceived as better than the idea it supersedes.

Appropriateness

Perceived fit; relevance; compatibility; suitability; usefulness; practicability

A measure of the degree to which an innovation is perceived as being compatible with existing values, past experiences, and the needs of potential adopters [54]

Feasibility

Actual fit or utility; suitability for everyday use; including the ease with which it can be piloted or trialled.

Alongside the concept of compatibility, feasibility also includes Roger’s concept of trialability i.e. the degree to which the innovation may be piloted and modified [54].