The identification of a disease's progression stage is known as Kriya Kala. This idea is primarily compared to the pathogenesis of disease. Kriyakala refers to the period of therapy or pause in the progression of an illness. The 21st chapter of the Sutrasthana has a detailed account of Shatkriyakala by Acharya Susrutha. Sanchaya, Prakopa, Prasara, Sthansamshraya, Vyaktavastha, and Bhedavastha are the six stages of Shatkriyakala. Shat means 6 Kriya signifies action or therapy Kala signifies period or time. Therefore, "appropriate time periods to take action/treatment" is what Shatkriyakala signifies. Ayurveda's Prayojana is divided into two categories: healing a disease in a sick person by using therapeutic methods, and maintaining health in a healthy person by following the Ritucharya, Dincharya, and Sadvritta.
Thalore et al. (Tue,) studied this question.