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Logic Model

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PPGPortal > Home > Concept Dictionary > K, L, M > Logic Model

Logic Model 

An illustration of the results chain or how the activities of a policy, program or initiative are expected to lead to the achievement of the final outcomes. Usually displayed as a flow chart.

(Treasury Board Secretariat)


Professor Les Pal offers the following alternative definition for this concept:

"A logic model is a graphical representation of the links between program inputs, activities, outputs, immediate outcomes, and long-term results."

A logic model is a visual way of expressing the rationale, thought or theory behind the design of a program, and presents a series of "if-then" relationships intended to depict what an intervention should accomplish.

Some advantages of using logic models to illustrate the linkages between inputs, outputs and outcomes are:

1.) Logic models can help public servants understand the overall structure and function of a program and the rationale behind its activities,

2.) Logic models can be used for prioritization and to help determine the appropriate allocation of resources,

3.) Logic models can be developed to test whether a policy, program or initiative makes sense from a logical perspective,

4.) Logic models can help users to identify important variables to measure and to ensure evaluation resources are used wisely,

5.) Logic models can help in the identification of key questions for evaluation.


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School of Public Policy and Governance