MULTI-PROJECT SCHEDULING BY CRITICAL PATH

IN 1963, THE DEPARTMENT OF HIGHWAYS, ONTARIO, UNDERTOOK ITS LARGEST HIGHWAY RECONSTRUCTION PROJECT, THE WIDENING OF THE TORONTO BYPASS. THIS PROJECT CONSISTS OF 24 MAIN CONTRACTS /WORK PROJECTS/, AND INCLUDES 20 MAJOR INTERCHANGES. THE WHOLE JOB IS TO BE COMPLETED WITHIN NINE YEARS, AND 60% OF THE WORK IS SCHEDULED FOR COMPLETION WITHIN THE FIRST FIVE YEARS. THE CRITICAL PATH TECHNIQUE WAS USED DURING THE DESIGN AND BUDGETING PERIOD AND IS BEING USED IN THE CONSTRUCTION PHASE. THE FIRST PART OF THE PAPER DESCRIBES THE EXPERIENCE GAINED DURING THE APPLICATION OF THE CRITICAL PATH TECHNIQUE TO THIS MULTI-PROJECT SCHEDULING PROBLEM. AS A RESULT OF THIS APPLICATION, MANAGEMENT ATTAINED FIRM CONTROL OVER AWARDING OF INDIVIDUAL WORK PROJECTS, AND THE TECHNIQUE WAS WELL RECEIVED BY THE CONTRACTORS. THE SECOND PART OF THE PAPER DEALS WITH A PROPOSED COMPUTER-ORIENTED SCHEDULING SYSTEM, APPLYING THE CRITICAL PATH TECHNIQUE TO PRE-CONTRACT ENGINEERING. THE SCHEDULING TASK IS COMPLEX DUE TO THE LARGE NUMBER OF WORK PROJECTS INVOLVED AND THE MANPOWER RESTRICTIONS IMPOSED ON EACH SECTION OF THE DEPARTMENT. THE PROPOSED SYSTEM WILL PROVIDE THE FOLLOWING MAJOR BENEFITS' /1/ SYSTEM FLEXIBILITY , WHICH INCLUDES FUTURE GROWTH FACILITIES, UPDATING OF INTERNAL SYSTEM PARAMETERS, PRODUCTION OF SCHEDULING REPORTS , ETC., /2/ SPEED OF REAPPRAISAL, /3/ MANPOWER AND EQUIPMENT ALLOCATION, AND /4/ INDUCEMENT OF PRE-PLANNING AND COORDINATION AMONG DEPARTMENT PERSONNEL. THE BACKBONE OF THE SYSTEM IS THE STANDARDIZATION OF ALL PROJECTS BY GROUPING THEM INTO WORK TYPES, SUCH AS GRADING, PAVING, ETC. THE CRITICAL PATH SCHEDULE ALSO PROVIDES CONTROL DATES FOR EACH SECTION, SUCH AS DESIGN, SOILS REPORTS, PROPERTY ACQUISITION , ETC., THUS PROVIDING AN OVERALL PRE-CONTRACT ENGINEERING SCHEDULE. IT IS INTENDED THAT THE COMPUTER WILL DETERMINE THE SUFFICIENCY OF MANPOWER AND OTHER RESOURCES, TAKE INTO ACCOUNT ANY RESTRICTIONS SUCH AS SEASONAL CONSTRUCTION, AND DETECT OVERLOADING OR UNDERLOADING IN VARIOUS AREAS.

  • Supplemental Notes:
    • No 30, pp 2-3
  • Authors:
    • Katarynczuk, W
    • Shen, K Y
    • Goodwin, A E
  • Publication Date: 1966-7

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  • Accession Number: 00200039
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 21 1994 12:00AM