Cloud based Cross Participation Tracking service – OVIS, successfully clears European Sponsor audit at a multinational CRO in Ahmedabad, India. OVIS is active in over 40 CRO locations across India. OVIS is the country wide cross participation tracking service to check the eligibility of the volunteers for healthy volunteers studies of BA/BE. This service covers the volunteers across India. The idea is to avoid the drub overdose on the volunteers as well as to avoid the risk to CROs. This system offer the days count from the previous studies. Considering the 3 months of blood regeneration time, the eligibility of a volunteer is decided by the CROs.