The exploration of the internal structure of hadrons in terms of quarks and gluons, the fundamental degrees of freedom of QCD, has been and still is at the frontier of hadronic high energy physics. The recently developed new concepts of transverse momentum dependent parton distribution and fragmentation functions (short TMDs), which go beyond the collinear appoximation, are a key to unravel the intricacies of the intrinsic motion of partons and the possible connection between their orbital motion, their spin and the spin of the nucleon.

The mapping of TMDs is a highly complex task that calls for a comprehensive program, combining new dedicated experiments with intense theoretical studies and lattice QCD simulations.

The experimental extraction of TMD observables is complicated by the complex kinematic dependences of the involved cross sections. In addition, a model independent and bias free extraction of TMDs from observables requires a full control of experimental effects that couple to the physical observables. For this task, dedicated Monte Carlo generators based on model parametrizations of TMDs are an essential tool.

This workshop aims for a lively discussion and exchange of information about Monte Carlo generators used at various experiments for the extraction of TMD observables. We further aim for a close collaboration with theoreticians for further developing existing or new generators based on TMD parametrizations.