* New - courses, vendors, classrooms, centers, locations, acquisitions
* Sales - increase offerings without staff trainer costs and investment
* Legal - avoid misclassification risks and penalties of contracting independent trainers directly
* Different Needs - custom classes, courseware, special set-up, subject experts
* Special Classes - new, advanced, infrequent , and special classes
* Gaps - vacations, training, seminars, meetings, shows, conferences
* Your Alternate Opportunities - consulting, development, management
* Emergencies - illnesses, accidents, resignations, terminations
* Financial - peaks, low/unpredictable utilizations, cost cutting
* Quality - when you want a satisfaction guarantee for your class quality