A vital element of a successful clinical trial is CRF designing, without which the clinical trial outcomes can be ambiguous objects and ineffectual. In simpler language, CRF design is a ‘case report form’ tool used by the sponsors of the clinical trial to gather data from each participating patient. All data on each patient participating in a clinical trial are held and/or documented in the CRF, including adverse events. Research centers assemble data on case report forms (CRFs) during trial participant visits in clinical trials, and use it to craft relevant CRFs. This is a key factor to study drugs garnering approval, and includes complying with protocol and regulatory needs.