Case Study Research

Attended half-time case Study training on 1st April by Dr John Davies- very attractive session..and after 1 and 1/2 hour, I felt case study is not easy research strategy- very though research methodology.....supposedly I attend for 3 hours but the time was not allow me to stay more since I have to go back to fetch daughters in 2.30 p.m with my spouse....but the handouts are very informative.....
In case study, it have four tests to ensure quality of research which are:

• construct validity

• internal validity

• external validity

• realibility

In case study too, 4 types of case study design:
1-single case(holistic) design
2-single case(embedded) design
3-multiple case(holistic) design
4-multiple ase(embedded) design- CURRENTLY i FEEL MY RESEARCH DESIGN IS SUITE WITH THIS ONE....but still identify the justification, otherwise I have to switch to the 3rd one....

6 source of evidences;
1-documentation-for my research it more to web documentation-BLOGS
2-archival records
3-interviews- applied to case in my pilot study only-look easy but need appropriate skills
4-direct observation
5-participant observation
6-physical artifacts