Charles Day (engineer)

Charles Day (May 15, 1879 – May 10, 1931)^[1]^[2] was an American electrical, construction and consulting engineer, and co-founder of Day & Zimmermann. He is known as a specialist in public utility management and operation,^[3] and for his seminal contributions to flow charts^[4] and the routing diagram.^[5]

^ Frederic A. Godcharles (1933), Pennsylvania: Biographical. p. xiii
^ George Valentine Massey (1968). The Mitchells and Days of Philadelphia: with their kin: Dr. S. Weir Mitchell and Helena Mary Langdon (Mitchell) and Kenneth MacKenzie Day, p. 11
^ Electrical World T & D, Vol. 97, 1931, p. 924
^ Charles D. Wrege, "Pioneer Documents in MIS A Closer Look." Proceedings. Vol. 1. American Institute for Decision Sciences, 1978. p. 303
^ AA Files: Annals of the Architectural Association School of Architecture, (2005, p. 50)

[1] Frederic A. Godcharles (1933), Pennsylvania: Biographical. p. xiii

[2] George Valentine Massey (1968). The Mitchells and Days of Philadelphia: with their kin: Dr. S. Weir Mitchell and Helena Mary Langdon (Mitchell) and Kenneth MacKenzie Day, p. 11

[EW_1931-3] Electrical World T & D, Vol. 97, 1931, p. 924

[4] Charles D. Wrege, "Pioneer Documents in MIS A Closer Look." Proceedings. Vol. 1. American Institute for Decision Sciences, 1978. p. 303

[AA_2005-5] AA Files: Annals of the Architectural Association School of Architecture, (2005, p. 50)

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