Often in a team of multiple employees, each has their own individual skills and expertise.
It is difficult for individuals to know each other's problems and solutions and share their set of skills and also know what others are working on. So if a similar problem comes up they can already have a solution.
Allow an employee to present a challenge he solved to his colleagues in a happy hour style environment. The employee is asked to share his challenges and solutions in a past project to his colleagues so other with a similar problem can have a head start on problem.
How would you stage or advertise your hack?
In an invitation by a manager to his select group of employees.