On solving large-scale multistage stochastic optimization problems with a new specialized interior-point approach.

•An IPM specialization for large-scale stochastic continuous optimization problems.•Strategic multistage / embedded operational two-stage scenario trees for uncertainty.•Structures: split-variable modeling object and block-diagonal matrix preconditioner.•Normal equations solving as a combination of Cholesky factorizations and a PCG.•Broad computational experience for supply network design and revenue management.