before_revision: ERG theory is a theory in psychology proposed by Clayton Alderfer. thumb Alderfer further developed Maslow's hierarchy of needs by categorizing the hierarchy into his ERG theory (Existence, Relatedness and Growth). The existence group is concerned with  providing the basic material existence requirements of humans. They include the items that Maslow considered to be physiological and safety needs. The second group of needs is those of relatedness the desire people have for maintaining important interpersonal relationships. These social and status desires require interaction with others if they are to be satisfied, and they align with Maslow's social need and the external component of Maslow's esteem classification. Finally, Alderfer isolates growth needs: an intrinsic desire for personal development. These include the intrinsic component from Maslow's esteem category and the characteristics included under self-actualization. Alderfer categorized the lower order needs (Physiological and Safety) into the Existence category. He fit Maslow's interpersonal love and esteem needs into the Relatedness category. The Growth category contained the self-actualization and self-esteem needs  . Alderfer also proposed a  regression theory to go along with the ERG theory . He said that when needs in a higher category are not met then individuals redouble the efforts invested in a lower category need . For example if self-actualization or self-esteem  is not met then individuals will invest more effort in the relatedness category in the hopes of achieving the higher need.Design in the Manufacturing Firm syllabus University of Washington Industrial Engineering course syllabus. Retrieved on 07-17-2011.
after_revision: ERG theory is a theory in psychology proposed by Clayton Alderfer. ERG theory. When needs in a category are satisfied, an individual will invest more efforts in the higher category. When needs in a category are frustrated, an individual will invest more efforts in the lower category. Alderfer further developed Maslow's hierarchy of needs by categorizing the hierarchy into his ERG theory (Existence, Relatedness and Growth). The existence category is concerned with the need for providing the basic material existence requirements of humans. The relatedness category is concerned about the desire for maintaining important interpersonal relationships. The growth category is concerned about the desire for personal development. These include the intrinsic component from Maslow's esteem category and the characteristics included under self-actualization. Alderfer categorized Maslow's physiological needs and Maslow's safety needs into the existence category, Maslow's social needs and Maslow's extrinsic component of self-esteem needs into the relatedness category, and Maslow's intrinsic component of self-esteem needs and Maslow's self-actualization needs into the growth category . Alderfer also proposed a progression and regression theory to go along with the ERG theory : he said that when needs in a lower category are satisfied, individuals invest more efforts in the higher category, and when needs in a higher category are frustrated, individuals invest more efforts in the lower category . For example if self-esteem or self-actualization is not met then individuals will invest more effort in the relatedness category in the hopes of achieving the higher need.Design in the Manufacturing Firm syllabus University of Washington Industrial Engineering course syllabus. Retrieved on 07-17-2011.
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edit_actions: They include the items that Maslow considered to be physiological and safety needs. The second group of needs is those of relatedness the desire people have
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edit_actions: These social and status desires require interaction with others if they are to be satisfied, and they align with Maslow's social need and the external component of Maslow's esteem classification. Finally, Alderfer isolates growth needs: an intrinsic
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