@sta I think you misunderstood. Let me try to explain in detail both my exit decision making and actual process of exit.
Exit decision making: The time frame decision to exit varies based on in-depth study when a I entered in some scripts without full study or based on changes in business varies from case to case from few weeks to many months. I am improving on my entry decisions. At a point, I had 50 tracking stocks in PF (as recent as July 2017) and I exited most of them one by one.
Exit Process once decision done: After deciding if I need to exit (by evaluating if the thesis working or not) for a reasonable period, I take maximum a quarter to exit. During this period, I see anything contrary to my older view crops up and I reserve the right to change the decision
For eg: In my current exit list Deep Industries remains. I am waiting to clear temporary negatives due to ONGC order cancellation or waiting to see if any positive triggers forming.
Sintex Plastics is on possible exit list and in further study mode as so far it did not play out as I was expecting. I was on evaluation mode on Tata motors DVR as well and now I decided to continue holding as I can see business is turning around, though slower than I expected.
Hope this clarifies.