5. Our advice

You run the risk of designing an inadequate product that doesn't meet user expectations.

This risk may stem from options and choices regarding the value of service functions (SF).

Potential uncertainties in the figures stem from the lack of information on certain relevant variables.

Take the time to conduct or commission user satisfaction surveys so that you can :

• identify all the parameters involved in the purchasing act;

• understand all the variables involved in using the product;

• integrate other environmental factors (climatic, political, financial, regulatory, standards, etc.) that influence the user's purchasing decision.