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TMI-2 focused attention on Human Engineering deficiencies in all nuclear plant control rooms while overlooking the evolution of their design and the principles of good system design. Reasons for the less than desirable features of the control rooms are explained. Standardization and modularization of board structure and board-mounted components are proposed to help achieve improvement in the designs. Mockups and more extensive use of C.R.T.' s are urged. A method of "Usage" or task analysis is presented and the importance of operator participation is emphasized.