International Journal of Operational Research

2005 - 2026

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Volume 56, issue 1, 2026

Optimising meal delivery through travelling salesman problem and cluster analysis pp. 1-15

Erkan Köse, Danışment Vural, Merve Yılmaz, Gizem İnci and Pınar Nur Oral

Bi-objective multiple drones and trucks combined operation parcel delivery pp. 16-40

Bhawesh Sah, Shalabh Singh, Rohit Titiyal and Sonia Singh

An inventory models for product life cycle for deteriorating items with growth of demand - a comparative statement pp. 41-65

C.K. Sivashankari

A location analysis and modelling approach for optimising public access to an automated external defibrillator network pp. 66-87

Trevor Angel, Lihui Bai and William Paul McKinney

Government subsidies for downstream innovation with cost-sharing under different power structures pp. 88-130

Chengli Wei, Hongzhuan Chen and Yuanfei Kang

Volume 55, issue 4, 2026

A numerical approach for fuzzy quadratic programming problems with an application to dairy farming pp. 429-461

Sumati Mahajan and S.K. Gupta

A new optimisation model of the visitor routing problem applied to smart tourism pp. 462-481

Safae Rbihou, Nour-Eddine Joudar and Khalid Haddouch

Analysis of the performance of SDN cloud controllers using non-Markovian queueing models pp. 482-494

Najeeb Al-Matar

Application of mixed-integer linear programming problems to optimise timetables and classroom arrangements pp. 495-514

Dinh Son Nguyen, Dinh Nhiem Le and Cong Hanh Nguyen

An optimal policy on a two-warehouse model for deteriorating inventory items with varying time-dependent generalised demand and the conditions of delay in payments pp. 515-542

Itishree Rout, Trailokyanath Singh and Ameeya Kumar Nayak

Approximate solutions of ordinary differential equations modelling queue length dynamics pp. 543-556

Zeina Mueen

A framework for nurse scheduling problems based on prevention of bad-relationships pp. 557-574

Mehboob Ali Kanhio, Zain-Ul-Abdin Khuhro, Farhat Naureen Memon and Muhammad Saleem Chandio

Volume 55, issue 3, 2026

The effect of preservation technology investment on inventory model with quadratic demand rate and time dependent holding cost under two-level trade-credit policy pp. 277-306

Manoj Kumar Sharma, Mukesh Kumar, Satya Jeet Singh and Divya Mandal

Dividend decision-making algorithm among multi-firms of available and required capacity within constrained horizontal coalitions pp. 307-329

Prem Prakash Mishra and Chipem Zimik

An improved Bombus-Terrestris bee optimisation algorithm implementation for enhancement of PQ in smart grid environment with hybrid renewable energy sources pp. 330-361

S. Mani Kuchibhatla, D. Padmavathi and R. Srinivasa Rao

A Markov model for prediction of academic manpower system in Nigerian colleges of education pp. 362-379

Shamsuddeen Ahmad Sabo, Nitesh Kumar Adichwal, Ibrahim Zakariyya Musa, Yakubu Isyaku Kibiya, Badamasi Abba, Syed Aqib Jalil and Akhil Damodaran

Scenario reliability assessment for CVaR minimisation in two-stage stochastic programs pp. 380-398

Ghazal Shah Abadi and Sarah M. Ryan

Enhancing project selection: elicitation of parameter values for effective multiple criteria project sorting pp. 399-428

Efrain Solares, Eduardo Fernández, Abril Flores, Reimundo Moreno-Cepeda, Raymundo Díaz and Edy López Cervantes

Volume 55, issue 2, 2026

Selection of suppliers for supplier development: an integrated FD-FIS approach pp. 129-156

Manojkumar V. Dalvi, Vishal A. Bhosale and Anjali S. More

A nonlinear mathematical model for optimal discount pricing strategies to maximise the stakeholders-perceived value: mapping in Taguchi loss function concept pp. 157-174

Bakhtiar Ostadi, Ali Abdollahi and Ali Husseinzadeh Kashan

A first augmented Lagrangian method for binary QCQP problems based on a class of continuous functions pp. 175-196

Nirakar Sahoo and Rupaj Kumar Nayak

Performance analysis and optimisation of secondary queue: a study of railway passenger reservation system pp. 197-220

S.M. Qasim and Jamal A. Farooquie

Inventory model for non-instantaneous deteriorating items with hybrid price and stock dependent demand in the view of delay in payments, inflation and customer returns pp. 221-246

Jayasankari Chandramohan and Uthayakumar Ramasamy

Improved managerial decisions for fuzzy stochastic bi-objective linear programming models: a trade-off ratio-based autonomised approach pp. 247-275

Arindam Garai, Santanu Saha and Kajal De

Volume 55, issue 1, 2026

Non-convex queue time-bound optimal load balancing pp. 1-14

Najeeb Al-Matar

Analysis of batch arrival general service queue with feedback, balking, general delay time and second optional service pp. 15-39

P. Vijaya Laxmi, Hasan Abdulkader Qrewi and Andwilile Abrahamu George

The Harris-odd Burr type X-G family of distributions with applications pp. 40-67

Broderick Oluyede, Neo Dingalo and Fastel Chipepa

Queueing models of machine repair problems with control policies: a survey and analysis pp. 68-127

Parmeet Kaur Chahal and Kamlesh Kumar

Volume 54, issue 4, 2025

Solving the multi-depot vehicle routing problem with limited supply capacity at the depots with a multi-phase methodology pp. 413-434

Javier de Prado, Sandro Moscatelli, Pedro Piñeyro, Libertad Tansini and Omar Viera

Optimising inventory management: addressing constant deterioration and imperfect items with screening, time-dependent demand and two-layer trade credit pp. 435-471

Chirag R. Trivedi, Mrudul Y. Jani, D.C. Joshi, Manish R. Betheja and Nakul Rawal

Threshold neutrosophic set and its application to decision making in planning and construction industry pp. 472-489

Tuhin Bera and Nirmal Kumar Mahapatra

Solving a practical examination timetabling problem via abductive reasoning and integer programming pp. 490-512

Daniel Morillo-Torres, Nicol Solarte-Herrera, Maicol Narváez-Rincón, Rafael Rojas-Millan, Gustavo Gatica and Jesus Gonzalez-Feliu

Impact of slippage cost and risk cost on software development under imperfect debugging environment pp. 513-528

Neha, Abhishek Tandon and Anu G. Aggarwal

Evaluation of power generation units of a thermal power plant focusing on sustainability and technical attributes pp. 529-558

Taquiuddin Z. Quazi and Vivek Sunnapwar

Volume 54, issue 3, 2025

Uncertainty quantification and global sensitivity analysis of an M/G/1 retrial queue with Bernoulli schedule pp. 281-309

Khedidja Boughafene and Karim Abbas

Permutation flow-shop scheduling with early and late penalty costs using the Jaya algorithm pp. 310-333

Raunaque Paraveen and Manoj Kumar Khurana

A new heavy-tailed Topp-Leone-G power series class of distributions with applications pp. 334-371

Gomolemo Jacqueline Lekono, Thatayaone Moakofi, Broderick Oluyede and Lesego Gabaitiri

Aspiration level-based multi-objective quasi oppositional Jaya algorithm to solve multi-objective solid travelling salesman problem with carbon emission pp. 372-392

Aaishwarya Bajaj and Jayesh M. Dhodiya

Design and development of an LPP model for food grain procurement: a case study pp. 393-411

M.R. Ganesh, B.M. Rijas and T. Radha Ramanan

Volume 54, issue 2, 2025

MADEA: multi-objective amended differential evolution algorithm pp. 135-158

I.R. Gawai and D.I. Lalwani

A novel fuzzy network ASBM approach based on DEA and DEA-R models for efficiency measurement in oil refineries pp. 159-210

Javad Gerami, Sahar Ostovan, Mohammad Reza Mozaffari, Peter Wanke and Yong Tan

Comparing classical time-series models and machine learning for demand forecast on the beverage industry in COVID-19 pandemic pp. 211-228

Ana Camilla Coelho de Macêdo and Caio Bezerra Souto Maior

Analysis of MMAP / PH (1), PH (2) /1 non-preemptive priority queueing model with phase-type vacation and repair, feedback, breakdown, close-down and reneging pp. 229-259

G. Ayyappan and S. Meena

Fluid approximation for a Markovian queue under disaster and reboot pp. 260-280

Mayank Singh and Madhu Jain

Volume 54, issue 1, 2025

Deteriorating inventory management model: adapting to variable lead time and consumer-driven shortages pp. 1-17

Atma Nand

Analysis of copula based variable clustering techniques and application of mortality estimation pp. 18-32

Zeynep Ilhan, Veysel Yilmaz and Kasirga Yildirak

RETRACTED ARTICLE Inventory control optimisation: the dynamics of deterministic request model of pharmaceutical appropriation and storage pp. 33-50

Adebayo Adedugba and Daniel Inegbedion

A model on an optimal ordering policy for deteriorating items with exponential declining ramp-type demand, variable deterioration and shortages pp. 51-69

Sephali Mohanty and Trailokyanath Singh

A two-phase extended warranty strategy for new and reman products pp. 70-88

P. Jalapathy and M. Mubashir Unnissa

A novel inverse DEA-R model as for decision maker's preferences pp. 89-134

Javad Gerami, Mohammad Reza Mozaffari, Peter Wanke and Yong Tan