Werk Enterprises uses surveys and data analytics to help organize work through a set of predefined, flexible arrangements, rather than the traditional 9-to-5 in the office. This HR version of mass customization can recalibrate the relationship between employers and employees to better match the needs of both. HBS alumna Anna Auerbach and her cofounder, Annie Dean, were initially motivated by the challenges facing professional women, whose careers have often suffered due to the conflicting demands of work and life. Werk touts hard numbers – in employee retention, net promoter scores, and productivity --  to make the business case for carefully tailored flexibility across the board, in contrast to the chaotic approach blamed for recent high profile pullbacks.