PHN

"the art and science of preventing disease, prolonging life and promoting health through the organized efforts of society".

by doing research. What are all the factors, who have an influence? Can you modify this determinants (i.e. you cannot change the gens) What are the needs of the stakeholders (i.e. food industry). Define your population group => Research. We try to find out what should it be then we found out what it is like and so we can implement an intervention.

Strategies, action  plans, interventions, projects on a local / regional / national or international level i.e. by taxes, front labeling, food tracing, changing the recipes in terms of sugar/salt/transfats (food industry). The interventions can be planned on a government base (like introducing a law) going down to an only monitoring base. 

should start already during implementing the intervention. Continuing function that provides the management and main stakeholders with early indications of progress => management function. You need something to monitor, before you start monitoring