Flexible study timelines tend to be more effective than rigid ones in UPSC preparation, as they allow candidates to adapt their study plans according to personal strengths, weaknesses, and life circumstances. This flexibility helps in reducing stress and maintaining motivation. Adapting study routines as needed can facilitate better retention of knowledge and deeper engagement with the material. Candidates can use techniques like setting short-term goals and adjusting study durations based on performance. In contrast, rigid timelines may lead to burnout, decreased productivity, and compromised learning.