I have understood that this is a research technique. I managed to find the instruments are:
Interview Guide, registration or certificate information, the questionnaire
I would like you to confirm me whether these are instruments of this technique and how many are missing?
I would also like you to cite me, which are the brackets of each instrument? For example, the questionnaire is an instrument of the technique called "survey" and the tangible bracket of this instrument is the paper printed with the bank of questions.