The focus group:
The focus group is the most used technique in qualitative studies. It is about a steered discussion, with a homogeneous group restricted to 8 persons directly concerned by the concept or the product object of the study.
One specialized driving force in the dynamics of group, animates debates, stimulates interactions and investigates attitudes, and motivations. Discussions are entirely filmed and re-transcribed and the content becomes the object of a thematic analysis.
A successful video circuit allows the customer to follow directly debates. 
A simultaneous translation is provided by professionals on inquiry.

The mini group:
The mini group answers the same standards as the focus group but it gathers less participants. One resorts to it to enrich, complete or to clarify the results of focus groups already realized. It is a tool used to indicate simple tests.
It presents the advantage of a fast collection of information, while profiting by some dynamics of group and advantages of the individual collection of information.

Interview in depth:
It is about face to face interviews which allow a deepening of the tackled questions. This step is recommended in case of the coming out of questions that are uneasy to deal with and to discuss in group, or in case of a population showing resistances to express its opinions and its attitudes within a group presenting the same profile (managers, competitors belonging to the same sector, etc.).

Qualitative observation:
The technique of the observation can be used qualitatively as well as quantitatively.
Qualitative observations consist in following and in studying methodical behaviours in a natural situation. The qualitative analysis can complete and enrich calculated tendencies raised by a quantitative investigation.