Collier Chemicals has redesigned many jobs to make the work more interesting and challenging for its employees. The company encourages its employees to further their education by reimbursing them up to $7,500 per year for tuition and related expenses. Collier also recognizes employee achievements at an annual company picnic each June and a company holiday party each December. Talented employees are given promotions and added responsibilities. These policies suggest that management at Collier Chemicals is using the findings of
(1) Abraham Maslow to satisfy lower-order needs of employees.
(2) Frederick Herzberg to increase worker motivation.
(3) Frederick Taylor to improve worker productivity through the principles of scientific management.
(4) William Ouchi to implement a Theory Z approach to management.

Frederick Herzberg developed his two factors theory from Abraham Maslow's hierarchy of needs theory. The two factors theory basically states that employers have a set of factors that make them motivated, and a different set of factors that make them unmotivated, and that both set of factors are independent from each other (hence the name).

In other words, employers may try to motivate employees by following certain actions, but this does not mean that employees will not feel unmotivated everynow and then, because the beliefs, actions and events that lead to lack of motivation are different from those that lead to more motivation.

Among the factors that motivate employees are: self-actualization, task complexity, recognition of achievement, incrased responsability.

In the question, Collier Chemicals is adopting strategies that try to meet these needs.