International Journal of Mathematics in Operational Research

2009 - 2026

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Volume 33, issue 5, 2026

Fuzzy best-worst method for analysing the threats of AI in education pp. 1-18

Irene Orayag Mamites

Volume 33, issue 3, 2026

Analysis of MAP/PH1, PH2/1 retrial inventory queueing system with phase type vacation, working breakdown, repair, essential and optional inventories pp. 287-326

S. Meena and G. Ayyappan

EOQ-type inventory models incorporating discount policies and carbon emission with warehouse capacity and capital constraints pp. 327-343

Tiara Alamanda, Dharma Lesmono and Jonathan Hoseana

Optimising inventory replenishment system - a case in multi-product multi-retailer pp. 344-360

Le Duc Dao and Huynh Nhat Huy

Supplementary variable technique approach on retrial queue with feedback and backup server during Bernoulli's lengthy vacation and random repairs pp. 361-390

R. Poornima and K. Kirupa

M/G/1 queue with regular and optional phases of services and vacations pp. 391-411

R. Kalyanaraman and K. Vidya

Short-term origin-destination demand forecasting in rail transit systems: parallel model architecture and gravity approach pp. 412-431

Tissawat Asavanant and Hiroshi Morita

Volume 33, issue 2, 2026

Investigation on inventory replenishment policy for a queueing system with catastrophic failure, negative arrival and discouragement customers pp. 133-167

G. Ayyappan and N. Arulmozhi

Performance comparison of random forest and BILSTM for intrusion detection in cyber security environment pp. 168-183

A. Prashanthi and R. Ravinder Reddy

Study of a production inventory policy with finite products life, few imperfect products and demand reliant on stock-level pp. 184-197

Sandeep Kumar, Robin Singh, Mukesh Kumar, Birjesh Kumar, Deepak Kumar and Rahul Singh

Kernel estimation analysis of the finite source M / G /1 queue with retrial and vacation pp. 198-214

Lyes Ikhlef and Karim Labadi

An optimal inventory system under markdown dependent demand environment pp. 215-237

Sonia Dua, Sandeep Kumar Mogha and Himani Dem

Sustainable supplier selection and order allocation using hybrid fuzzy weighting methods, scenario-based programming, and flexible robust optimisation pp. 238-285

Marzieh Saneei, Mehdi Seifbarghy and Mohsen Hamidi

Volume 33, issue 1, 2026

Towards sustainable two-warehouse inventory management: flexible payments and demand-driven optimisation with preservation technology and carbon emission considerations pp. 1-42

Neha Rani and Manoj Kumar Sharma

Dynamic service management and priority handling in dual server queuing systems with breakdowns pp. 43-72

G. Ayyappan and S. Sankeetha

An inventory system for imperfect products with the effect of carbon emission and with free transportation on a prepaid basis pp. 73-87

Sandeep Kumar, Robin Singh, Manoj Kumar, Mukesh Kumar and Prachi Fartyal

The strategic value of seller's option in buyback guarantee financing pp. 88-112

Yang Huang, Wenxuan Wang and Qiangqiang Wang

A two-tier sustainable supply chain model with the influence of carbon release under a fuzzy environment pp. 113-131

Varuna Bhardwaj, Sunil Kumar and Vipin Kumar Tyagi

Volume 32, issue 3, 2025

Analysis of Markovian queueing model with two phase of services, single and multiple working vacations and customer balking pp. 277-293

K. Baby Saroja and V. Suvitha

Construction of distance measure for Fermatean fuzzy sets and its application in educational assessment and medical diagnosis pp. 294-330

Dibakar Dutta, Palash Dutta and Brindaban Gohain

Nonlinear fuzzy programming - a case study pp. 331-347

Arpita Kabiraj, Swapan Raha and Prasun Kumar Nayak

A sustainable demand disruption recovery model considering non-zero lead time and advance payment policy during any emergency like COVID-19 pandemic pp. 348-389

Dolagobinda Das and Gauranga Charan Samanta

Profit optimisation for deteriorating products with price and stock-based demand with partial credit policy pp. 390-425

Santosh Shekhawat and Kalpna Sharma

A new approach for counting patterns in language theory, matchings, and set partitions pp. 426-442

Fatima Hessas, Mouloud Goubi and Noria Benkhemmou

Volume 32, issue 2, 2025

Self-adjusting formulae for the solution of fuzzy differential equations with triangular fuzzy numbers pp. 145-178

Joshua Sunday, Joel Nimyel Ndam and Anthony Chukwuemeka Onyekonwu

Reliability measures of repairable k -out-of- n system using weighted exponential-Lindley distribution pp. 179-198

Sunita Sharma, Vinod Kumar and S.B. Singh

A genetic algorithm combined with mathematical programming to solve generalised quadratic multiple knapsack problem pp. 199-213

Yassine Adouani

Graphical neural network-based MCDM for evaluating sustainable city logistics measures pp. 214-238

K. Vasantha Lakshmi and K.N. Udaya Kumara

Lexicographic multi-objective geometric programming problems with pentagonal fuzzy parameters using robust method pp. 239-250

Sudipta Mishra and Rashmi Ranjan Ota

An adaptive hybrid direction algorithm for convex box-QP problems with enhanced pre-solving pp. 251-275

Abdelhek Laouar and Mohand Ouamer Bibi

Volume 32, issue 1, 2025

Analysis of MAP / PH /1 retrial inventory queueing system with phase type vacation and unreliable server pp. 1-30

G. Ayyappan and S. Meena

Balancing sustainability and profitability in inventory management: insights into carbon emissions, consumer demands, payment strategies, and green investments pp. 31-89

Manoj Kumar Sharma, Neha Rani and Anshika Rajpal

Enhanced non-dominated sorting genetic algorithms for fuzzy multi-objective multi-route shortest path problem pp. 90-122

Aniket S. Todkar and Jayesh M. Dhodiya

Enhancing reliability and performance of sequential chiller system using copula pp. 123-144

Ameer Hassan Abdullahi, Abdulhadi Aminu and Ibrahim Yusuf

Volume 31, issue 4, 2025

An inventory model with hybrid time-stock dependent demand for seasonal products with trade credit policy pp. 435-464

Prokash Mondal, Sudhansu Khanra and Pritha Das

Optimising inventory in business environments: combining matrix analytic methods with a working vacation, cancellation policy and working breakdown pp. 465-497

G. Ayyappan and N. Arulmozhi

A healthcare divisions inventory model for deteriorating items with a variable deterioration rate under permissible delay in payments pp. 498-517

Mukesh Kumar, Manoj Kumar Sharma, Ajay Sharma and Shalu Chaudhary

The Ristić-Balakrishnan-exponentiated half logistic-G family of distributions with applications pp. 518-543

Broderick Oluyede and Kethamile Rannona

An enhancing IOT security with a trinary deep learning paradigm and squirrel reptilian optimisation pp. 544-575

K. Navaz, N. Muthuvairavan Pillai, G. Shanmuga Sundaram, T. Rajesh Kumar and C. Jehan

Volume 31, issue 3, 2025

A novel approach to optimise fuzzy association rule by using evolutionary genetics algorithm pp. 283-313

Bijayini Mohanty, Santi Lata Champati and Swadhin Kumar Barisal

The inventory model for optimal replenishment policy with deterioration and various interest rates: two levels permissible delay in payment strategy pp. 314-338

Jitendra Kaushik

On efficient solutions to bi-objective max-linear programming problems pp. 339-371

Abdulhadi Aminu, Sunday E. Olowo and Salisu Usaini

An attempt on neutrosophic multi-attribute decision making based on generalised signed distance method pp. 372-396

Manas Karak, Tuhin Bera, Mahendra Rong and Nirmal Kumar Mahapatra

Job shop scheduling in Wafer Fab with random job arrivals using hybrid tabu search technique pp. 397-412

Rosshairy Abd. Rahman, Kean Heong Lee, Syariza Abdul-Rahman and Azhar Mahdi Ibadi

A Markovian two server queue with state dependent hybrid service discipline pp. 413-434

R. Kalyanaraman and B. Anurathi

Volume 31, issue 2, 2025

Analysis of non-Markovian batch arrival retrial queue with priority services, vacation and vacation interruption under random environment, negative arrival, immediate feedback, differentiate breakdown, and repair pp. 143-163

G. Ayyappan and S. Nithya

A transient M [ X ] / M ( k, K ) /1 queue with reneging and setup time for service pp. 164-181

Aliakbar Montazer Haghighi and Dimitar P. Mishev

A multi-machine bicriteria flow shop scheduling with sequence dependent setup time pp. 182-215

Meenakshi Sharma, Sameer Sharma and Nidhi Joshi

IoT-botnet attack detection and mitigation using ensembled-deep-learning-model pp. 216-240

Swapna Thota and D. Menaka

Recital facts of M X / G /1 queues with setup time, phases of service, and vacation pp. 241-262

S. Maragathasundari and K. Karthikeyan

Optimal joint dynamic pricing and inventory replenishment policy for perishable products with freshness-sensitive demand pp. 263-281

Mahmoud Dehghan Nayeri and Roghayeh Haddad

Volume 31, issue 1, 2025

Strong perturbation bounds for the stationary distribution of the main multi-server retrial queue model pp. 1-40

Nabil Ait Yala, Badredine Issaadi and Karim Abbas

A queueing model with balking, server vacation and working breakdown pp. 41-59

Kamlesh Kumar and Madhu Jain

Integrated management and optimisation of vaccination and treatment processes in a batching system with observation and limited space pp. 60-94

G. Ayyappan and S. Sankeetha

A study on transient solution of fractional M / M /2 queue with homogeneous and heterogeneous servers pp. 95-109

N. Sujatha and G.V.S.R. Deekshitulu

Solving the vehicle routing problem with search algorithms: a comparative analysis pp. 110-141

Oladimeji Samuel Sowole