“…Occurrences in research articles ef1-Project Priority [6], [7], [51], [77] ef2-Lack of Motivation and Direction [14], [18], [19], [66], [67], [78] ef3-Change Cost [5], [7], [8], [10], [18], [19], [47], [49], [50], [66], [69], [70], [71], [72], [74], [77], [79], [82], [83], [84], [85] ef4-Project Resources [7], [10], [67], [71], [86], [74], [80], [83], [72] ef5-Project Risks [7], [9], [10], [50], [66], [70], [77] ef6-Rework [7], [14], [19],…”