Test of Collected Data Tool
The researcher and professional personnel will discuss to create a collected data tool covering all studied issues. There will be a reliable accuracy test of an information form until it is found that the form is accurate to be used which will be tested again through the pilot study before being practiced.

Test – Before Data Collection at Filed Work
Supervisor will call for a meeting to provide all details about the questionnaire to the field work officers including the objectives and work processes in details. After meeting, there will have a pilot study to get to know all likely-to-occur problems during the data collecting at site. Next, after the pilot test, the supervisor will call for another meeting to provide the job details again ( Debrief) by concluding the field work problems including advice for problem solving before the actual field work operation.

Test of Field Work Officers Operation
Kanok Research complies the international standard of field work test consisting of:
- Supervisor joining the field work operation with the field work officers.
- Supervisor test by conversational test through the telephone or checking back through the questionnaire address for data accuracy.
- Field work test by supervisor accompanying the officers interviewing the interviewee as of the field work specified address.
- Data ‘s accuracy test within 48 hours by the supervisor after sending back the questionnaire to the officer building.

Test of Data’s Code creation
All questionnaires will be checked for the completion again before being created data’s code.
Researching manager will be held responsible for the data’s code creation for the continuation of data’s code. The supervisor will check the accuracy of all data’s codes.