The next joint European Conference on Stochastic Optimization (ECSO) and Computational Management Science (CMS) 2027 will be held at Lancaster University, UK, from 20–23 June 2027. The conference will bring together researchers and practitioners working on optimisation, and decision-making under uncertainty. We welcome contributions covering a broad range of topics, including (but not limited to): Stochastic programming Robust and distributionally robust optimisation Stochastic modelling and simulation–optimisation Combinatorial optimisation Exact and heuristic methods Machine learning for optimisation and decision-making Applications in transportation, finance, energy, healthcare, hospitality, marketing, and supply chain management The conference programme will include invited plenary lectures, invited and contributed sessions, tutorials, and a Best Student Paper Competition. A limited number of financial grants will be offered to support attendance of PhD Students, Early Career Researchers, and Delegates with Caring Responsibilities. Important dates Tutorial proposal deadline: 15 Dec 2026 Abstract submission deadline: 4 Feb 2027 Notification of acceptance: From date of submission to 11 Mar 2027 Travel grant application: 18 Mar 2027 Conference: 20–23 June 2027 Full details, including submission guidelines and registration information, are available on the conference website .