Machine learning analysis of queues with MAP, Reneging, Phase Type services, vacations and repairs. - G. Ayyappan; K. Thilagavathy (DSMLAI, 2021)

Analysis of MAP/PH/1 queueing model with immediate feedback, starting failures, single vacation, standby server, delayed repair, breakdown and impatient customers. - G. Ayyappan; K. Thilagavathy (Int. J. Math. Oper. Res., 2021)

Analysis of MAP/PH1E, PH2O/1 queue with standby server, second optional service, variant arrival rate, Bernoulli schedule vacation, impatient behaviour of customers, breakdown, essential and optional repair. - G. Ayyappan; K. Thilagavathy (Int. J. Math. Oper. Res., 2022)

Analysis of MAP/PH/1 queueing system with catastrophic delay action, standby server, balking, working vacation and vacation interruption under N-policy. - G. Ayyappan; K. Thilagavathy (Int. J. Math. Model. Numer. Optimisation, 2023)

Cost optimisation of MMAP/PH(1), PH(2)/1 pre-emptive priority retrial queueing model with standby server, orbital search, server breakdowns, phase type repairs and impatient customers. - G. Ayyappan; K. Thilagavathy; Rakesh Kumar (Int. J. Math. Oper. Res., 2025)