Dr. Ilia Vonta has published more than 30 research papers in international journals while she has edited jointly with Nikulin, Limnios & Huber-Carol the volume Statistical Models and Methods for Biomedical and Technical Systems, Springer (Birkhäuser). Over the last 20 years, she has been involved in a series of research projects mostly as Statistical Investigator in the general area of Biomedical Sciences. Dr. Mangey Ram received his Ph.D., major with Mathematics and minor in Computer Science, from G. B. Pant University of Agriculture and Technology, Pantnagar in 2008. He is an editorial board member in many international journals. He has published 102 research publications in national and international journals of repute. His fields of research are Operations Research, Reliability Theory, Fuzzy Reliability, and System Engineering. Currently, he is working as a Professor at Graphic Era University.

• 1. Multi-State Systems. 2. System Performance. 3. Availability. 4. Maintenance. 5. Markov Systems. 6. Semi-Markov Models. 7. Reliability Assessment. 8. Lz Transformation. 9. Survival Analysis. 10. Statistical Inference. 11. Preventive Maintenance. 12. Optimization. 13. Operational Cost. 14. Repairable System. 15. Markov Process. 16. Degradation Process. 17. Stochastic Process.

Dr. Ilia Vonta has published more than 30 research papers in international journals while she has edited jointly with Nikulin, Limnios & Huber-Carol the volume Statistical Models and Methods for Biomedical and Technical Systems, Springer (Birkhäuser). Over the last 20 years, she has been involved in a series of research projects mostly as Statistical Investigator in the general area of Biomedical Sciences. Dr. Mangey Ram received his Ph.D., major with Mathematics and minor in Computer Science, from G. B. Pant University of Agriculture and Technology, Pantnagar in 2008. He is an editorial board member in many international journals. He has published 102 research publications in national and international journals of repute. His fields of research are Operations Research, Reliability Theory, Fuzzy Reliability, and System Engineering. Currently, he is working as a Professor at Graphic Era University.

• 1. Multi-State Systems. 2. System Performance. 3. Availability. 4. Maintenance. 5. Markov Systems. 6. Semi-Markov Models. 7. Reliability Assessment. 8. Lz Transformation. 9. Survival Analysis. 10. Statistical Inference. 11. Preventive Maintenance. 12. Optimization. 13. Operational Cost. 14. Repairable System. 15. Markov Process. 16. Degradation Process. 17. Stochastic Process.

Dr. Ilia Vonta has published more than 30 research papers in international journals while she has edited jointly with Nikulin, Limnios & Huber-Carol the volume Statistical Models and Methods for Biomedical and Technical Systems, Springer (Birkhäuser). Over the last 20 years, she has been involved in a series of research projects mostly as Statistical Investigator in the general area of Biomedical Sciences. Dr. Mangey Ram received his Ph.D., major with Mathematics and minor in Computer Science, from G. B. Pant University of Agriculture and Technology, Pantnagar in 2008. He is an editorial board member in many international journals. He has published 102 research publications in national and international journals of repute. His fields of research are Operations Research, Reliability Theory, Fuzzy Reliability, and System Engineering. Currently, he is working as a Professor at Graphic Era University.

• 1. Multi-State Systems. 2. System Performance. 3. Availability. 4. Maintenance. 5. Markov Systems. 6. Semi-Markov Models. 7. Reliability Assessment. 8. Lz Transformation. 9. Survival Analysis. 10. Statistical Inference. 11. Preventive Maintenance. 12. Optimization. 13. Operational Cost. 14. Repairable System. 15. Markov Process. 16. Degradation Process. 17. Stochastic Process.