International Journal of Mathematics in Operational Research

2009 - 2026

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Volume 34, issue 2, 2026

Replenishment of Bhadla Solar Park using interval valued neutrosophic threshold graph pp. 137-153

R. Keerthana, S. Venkatesh and R.U. Gobithaasan

An inventory model with power demand and preservation technology investment under advanced and delayed payment policies pp. 154-191

S. Loganayaki and K. Kirupa

Bifurcation analysis and effective approaches to control for measles using SEIR mathematical model pp. 192-214

H.A. Bhavithra and S. Sindu Devi

A study on retrial queueing model with additional breakdown services and complete vacation pp. 215-230

R. Madhumidha and S. Balaji

Numerical investigation of phase type inventory queueing system with ( s, S ) policy, degrading service, single vacation, closedown, breakdown, repair and impatient customers pp. 231-260

G. Ayyappan and S. Meena

A fuzzy MS-TORO approach for aircraft rerouting problem pp. 261-286

Miriam F. Bongo

Volume 34, issue 1, 2026

Solving an EOQ model for stock, selling price and customer's income dependent demand under dense lock fuzzy environment pp. 1-23

Suman Maity, Sujit Kumar De, Madhumangal Pal and Sankar Prasad Mondal

Solving coupled system of nonlinear integral and functional equation via coupled fixed point technique in G-metric space pp. 24-53

R. Anna Thirumalai and S. Thalapathiraj

Analysis of a finite retrial queueing system with orbital search using generalised inverses pp. 54-72

R. Kalyanaraman and S.B. Pattabi Raman

Concrete compressive strength prediction modelling utilising ensemble-deep-learning framework pp. 73-99

Mu'tasime Abdel-Jaber, Ma'en Abdel-Jaber, Rob Beale and Nisrine Makhoul

Numerical solutions of initial value problem by using modified Euler's method and Taylor's method pp. 100-118

Rashmi Kumari and V.K. Pandey

Strategic pricing: examining the impact of showrooming behaviour on manufacturer-retailer dynamics in a supply chain pp. 119-136

Ping Su, Xiangling Hu and Jaideep Motwani

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 4, 2026

A weighted neutrosophic fuzzy goal programming approach to optimise multi-objective assignment problem pp. 433-464

Debasmita Sarkar and Pankaj Kumar Srivastava

A note on an EOQ inventory model with varying time-dependent demand and shortages under the conditions of delay in payment pp. 465-488

Trailokyanath Singh, Itishree Rout and Ameeya Kumar Nayak

Designing of single acceptance sampling plan based on time truncated life test under new Weibull-Pareto distribution pp. 489-500

S. Swathi Sundari, G. Kannan, S. Balamurali, K. Lakshmanan and G. Selvaraj

Benchmarking decision-making units' efficiency for the case of integer-valued data and fixed factors: a super efficiency slacks-based measure approach pp. 501-545

Mushtaq Taleb, Mamdooh AttAllah, Ruzelan Khalid and Rosshairy Abd Rahman

Sustainable supply chain for developing new product with considering political aspect using mathematical programming and fuzzy multi-criteria decision-making pp. 546-576

Samaneh Mirzamohammadi and Meghdad Jahromi

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