Answer:
1st generation: focused on individual growth through t-groups: management practices and employee involvement.
-action research, survey feedback, and socio-technical systems.
2nd generation: emphasized larger, system-wide concerns such as culture, change management, and organizational development.
Step-by-step explanation:
I believe there is a little big of both losses and gains. OD is not a one-size fits all approach. therefore different organizations require different approaches. it is a gain in the sense that we have new experiences and research programs, and academics have built on the previous practices so they are unique and improved. But it is a loss because maybe for a specific company a 1st generation OD practice would work best but it has been overlooked or changed so much because of the 2nd generation "gains" they never try it out.