Correct Answer - Option 1 : F.W. Taylor
Explanation
Functional Organisation System of working was introduced by F. W. Taylor.
Henry Gantt – He created Gantt charts that are used in major infrastructure projects.
M.R. Walker and J.E. Kelley jointly developed a project Management technique called the Critical Path Method (CPM).
Note:
PERT (Program Evaluation Review Technique), a methodology developed by the U.S. Navy in the 1950s