Background: Over the last 20 years the software development community has implemented agile techniques over the traditional approach to software development. Agile methods require less upfront costs and increase project flexibility; however, agile methodology is not infallible. Objective: This research seeks to validate the assumption that there is a lack of robust research regarding agile project management and its use in the software development industry. This extensive review of existing literature on the topic will serve as a basis for new research on areas with existing ambiguity. Method: The search engines used to identify relevant literature from 1987 to 2021 on the topic were Business Source Premier and Google Scholar. The procedure used to narrow the search queries was the use of deliberate keywords and phrases such as “agile software development” and “cost of requirement errors”. All results were cross-referenced on both search engines to validate the accuracy of each source. Results: 76 papers containing relevant information to agile project management within the software community have been identified: 55 academic journals, 1 book, 1 conference paper, 1 magazine article, 7 periodicals, 10 professional journals, and 1 textbook. 35 papers are critical of Agile methodology, 16 focus mostly on its strengths, 12 focus mainly on its weaknesses, and 13 contain relevant information regarding the cost of requirement errors
