The following sources were cited in SAP Digital Futures Issue 11 Flowing Into High Business Performance

Worldwide, only 13% of employees are fully involved in and enthusiastic about their jobs.
Steve Crabtree, “Worldwide, 13% of Employees Are Engaged at Work,” Gallup Inc., October 3, 2013

While “in flow,” business executives report a five-fold increase in productivity.
Susie Cranston and Scott Keller, “Increasing the ‘Meaning Quotient’ of Work,” McKinsey Quarterly, January 2013,

Military snipers who trained in a flow state learned skills 230% faster.
Steven Kotler, “Create a Work Environment That Fosters Flow,” Harvard Business Review, May 6, 2014,

Research has discovered 17 triggers that speed entrance into the flow state.
Steve Kotler, “The Rise of Superman: 17 Flow Triggers” (PowerPoint deck), SlideShare posted March 3, 2014,

 Companies that have employees revisit their goals at least quarterly are 3.5 times more likely to be top performers in their industry.
“Bersin by Deloitte: Effective Employee Goal Management Is Linked to Strong Business Outcomes” (press release), PR Newswire, , December 17, 2014,