The objective of GLIA is to provide a tool for the appraisal of the implementability of clinical guidelines. Implementability refers to a set of guideline characteristics that predict potential challenges to effective implementation. In addition to a series of questions that inquire about global aspects of a guideline's implementability, the instrument explores the following dimensions of individual recommendations:

  • Executability
  • Decidability
  • Validity
  • Flexibility
  • Effect On Process Of Care
  • Measurability
  • Novelty/Innovation
  • Computability

In 2011 we revised the GLIA instrument creating GLIA 2.0 based on user feedback. The revised instrument clarifies several questions, reorders the dimensions for a more logical flow, and streamlines the appraisal process.

A discussion of the original development of GLIA has been published in BMC Medical Informatics and Decision Making at The GuideLine Implementability Appraisal (GLIA): development of an instrument to identify obstacles to guideline implementation.


To obtain a copy of GLIA 2.0 in Adobe PDF format, Click Here.

We recommend that all users download version 2.0, unless the older version is needed for continuity.

To obtain a copy of Version 1 of the GLIA instrument, Click here.

eGLIA is a web-based version of the GuideLine Implementability Appraisal (GLIA) instrument. eGLIA facilitates the appraisal and reporting of potential obstacles to successful guideline implementation. Unfortunately, eglia is temporarily unavailable. We are working to build a more stable version.