The Power of Purpose by Rebecca A. Morgan:
Constancy of purpose means that quality decisions are not situational. End of month quality is the same as beginning of month. It means that the long term benefit of the organization is not sacrificed to hit quarterly targets. It means having your eye on the competition, whether it is in your industry or coming from elsewhere, with plans to stay ahead. Constancy of purpose doesn’t require the threat of a customer leaving to implement corrective actions based on root cause. It means that while your team may argue about how best to accomplish it, no one is confused about the commitment to deliver reliable quality.
Deming’s Fourteen Points, point 1: Create constancy of purpose for the improvement of product and service. With the aim to become competitive, stay in business, and provided jobs.” source, Deming Institute [the broken link was removed].