Action Logic Modelling Logic Models communicate a vision for an intervention as a solution to a public health nutrition (PHN) problem to: funding agencies,

Action Logic Modelling

Logic Modelling

• Logic Models communicate a vision for an intervention as a solution to a public health nutrition (PHN) problem to: funding agencies, management, key stakeholders, target population

• Logic Models conceptualise an intervention into a diagram that clearly illustrates the strategy mix, assumptions and causal chain of change expected results, that will contribute to the achievement of goals and objectives

‘A picture paints a thousand words’

Logic Modelling

What is a Logic Model?

• A logic model shows the assumptions underlying the intervention activities, and graphically depicts the association between the main intervention strategies, and the goals, objectives, target group, indicators and resources

• A well constructed logic model is like road map that explains where you are going, how you will get there and will identify when you arrive

• A logic model is a communication tool for all stakeholders to understand: the overall structure and function of an intervention how intervention strategies link with goals and objectives Common assumptions, intensions and actions

Logic Modelling

What is a Logic Model?

• Logic models are useful in planning and evaluating PHN interventions:

Planning Identify gaps and inconsistencies within an intervention Involving stakeholders to participate in intervention planning

Evaluation Matching intervention strategies with objectives and indicators of success Helps assess when an intervention is ready to be evaluated (evaluability

assessment) Assist identify the success indicators that are critical for intervention evaluation

Logic Modelling

Types of Logic Models

• Logic models come in various shapes and forms, depending on the nature of the intervention the needs and preferences of the stakeholders

• Logic models are usually depicted in chart form with: lines or arrows show relationships between intervention features - strategies,

objectives, target population, partnerships etc intervention features are usually presented in boxes or ovals

• Boxes can be vertical, horizontal, circular or more complex and dynamic

Logic Modelling

Logic Modelling

Example logic model layouts

Taylor-Powell and Henert (2008)

Logic Model Elements• Logic models contain several key elements that are necessary to explain

the link between the problem, intervention and the impact

• Logic model elements: Situation – explains the relevance of the intervention – what the problem is

and who is affected - intervention goal and target group Inputs – the resources and capacity put into the intervention

Outputs – the activities and strategies of the intervention

Outcomes – the results or intended impact of the intervention – objectives and sub-objectives

External Influences – the social, political, physical and institutional environments that can influence the outcomes

Logic Modelling

Logic Modelling in PHN Practice

• Logic modelling in PHN intervention management draws upon the previous determinant analysis and assists develop evaluation indicators

• Consistent with the capacity building principles that underpin PHN practice, logic model development should involve extensive consultation with stakeholders.

• Involving stakeholders: tests the feasibility of the proposed intervention creates increased agreement with the intervention design increases participation in intervention implementation

Logic Modelling

Developing a Logic Model

Logic Modelling

• The recommended process for developing a logic model is to work through four key tasks: Preparation – community & stakeholder engagement and consultation,

capacity analysis, timeline, decision making Intelligence – gathering information re the PHN problem, its determinants

and strategy options Creation – decide how much information will be included and the type of

logic model Review – presenting and discussing the logic model with key stakeholders

• The first two tasks in this process have largely been completed in the previous steps (1-9) of the PHN intervention management bi-cycle

Logic Modelling

For PHN interventions logic models are most effective when they are displayed on a single page.

Constructing a logic model within a single page ensure only the key elements of the intervention are included and stakeholders can

gain a more logical and simple understanding of what the intervention is intending to achieve, how it will be implemented

and what the key measures of success are.