Herzberg asked people about times when they had felt good about their work. He discovered that the key determinants of job satisfaction were Achievement, Recognition, Work itself, Responsibility and Advancement.
He also found that key dissatisfiers were Company policy and administration, Supervision, Salary, Interpersonal relationships and Working conditions.
What struck him the most was that these were separate groups with separate evaluation, and not a part of the same continuum. Thus if the company resolved the dissatisfiers, they would not create satisfaction.