The main purpose of this tender is to engage a contractor to carry out case studies of companies and other workplaces which have introduced a reduction of working time (4-day work week or other model of working time reduction) to obtain information on issues including the rationale behind the reduction of working time, reasons for the model of working time reduction chosen, how it was implemented and its impact on company revenues, productivity, competitiveness, innovation, workforce structure, work organisation, working conditions and job quality, skills development employee wellbeing and work-life balance.