TA had its origins in psychiatry - curing the patient which involved therapy by a qualified and competent therapist.
With the development of TA into such fields as Organisational, Educational and Coaching, the emphasis on 'cure' was not appropriate.
Julie Hay (TSTA Org/Ed/Psych) in England coined the phrase 'Developmental TA' to differentiate it and to put the emphasis on healthy functioning. Several people including Julie have then adapted the various TA theories (previously with the focus on pathology) to ones appropriate to focusing on health which enable people to 'develop' and function more appropriately in their world.
Within workplaces, organisations and in the coaching role, these developmental TA theories can be of huge benefit to better understand ourselves, our colleagues, managers, course participants, family and friends and our social contacts.
I trust you will be intrigued and want to look further for what TA has to offer you, your organisation/workplace, university, school, church group, voluntary group …
Developmental TA puts the emphasis on "Healthy Functioning ... to enable people to develop and function more appropriately in their world"