Using previous years' papers of UPSC Management optional subject is an effective way to practice time-bound answer writing. By analyzing and attempting these papers, candidates can familiarize themselves with the exam pattern, gain insights into the type of questions asked, and develop their writing skills. Here's a step-by-step guide on how to utilize these papers for practice:

1. **Understand the Exam Pattern**: Before starting the practice, it is essential to thoroughly understand the exam pattern, marking scheme, and syllabus of the UPSC Management optional subject. This will help in identifying the key areas to focus on while attempting the papers.

2. **Organize the Papers**: Collect the previous years' papers and arrange them in a chronological order. This will allow you to track your progress and observe any changes in the pattern or trend of questions over the years.

3. **Time-bound Practice**: Set a timer for the duration specified in the actual UPSC exam, which is generally three hours. This will help you simulate the exam environment and practice answering questions within the given time limit.

4. **Attempt Full-Length Papers**: Begin by attempting full-length papers to get accustomed to the overall length and structure of the exam. This will also help in building your endurance and time management skills.

5. **Analyze your Performance**: After completing each paper, evaluate your performance objectively. Identify the areas where you struggled or took more time than necessary. Analyze the mistakes made and learn from them. It is also beneficial to compare your answers with the model answers provided by UPSC or any reliable sources.

6. **Focus on Weak Areas**: Pay attention to the topics or sections where you faced difficulties or scored poorly. Revise those concepts, refer to relevant study materials, and practice more questions related to those areas to improve your understanding and performance.

7. **Practice Question-wise**: Apart from attempting full-length papers, it is also beneficial to practice answering questions individually. This will help you focus on specific topics and enhance your ability to provide concise and comprehensive answers.

8. **Develop Time Management Strategies**: As you practice more papers, you will gain a better understanding of how to allocate time to different sections or questions. Experiment with different time management strategies and figure out what works best for you.

9. **Track Progress**: Keep a record of your performance in each practice paper. Monitor your progress over time and identify areas of improvement. This will help you gauge your readiness for the actual exam and make necessary adjustments in your preparation strategy.

By following these steps and consistently practicing with previous years' papers, candidates can effectively enhance their time-bound answer writing skills for the UPSC Management optional subject. Remember, regular practice and self-evaluation are key to success in any competitive examination.