Figure 4.
The Pareto chart presents barriers to Green Public Procurement G P P performance evaluation and their frequency in research papers. The horizontal axis lists barrier categories, and the vertical axis on the left shows the number of papers. A secondary vertical axis on the right shows cumulative percentage values from zero percent to one hundred percent. Bars represent the number of papers for each barrier category. Values decrease from left to right. Knowledge barriers appear with 28 papers. Awareness barriers appear with 25 papers. Budget constraints appear with 23 papers. Resistance to change appears with 20 papers. Regulatory barriers appear with 20 papers. Prioritising social development and cost appears with 19 papers. Commitment and collaboration among stakeholders appears with 18 papers. Lack of management support and motivation appears with 17 papers. Government support and incentives appears with 17 papers. Inappropriate internal structures and culture appears with 16 papers. Unavailability of green products appears with 16 papers. Inadequate education and training appears with 15 papers. Lack of G P P skills and expertise appears with 15 papers. Lack of methods and tools for evaluation appears with 15 papers. Unrealistic policies appears with 13 papers. Guideline issues appears with 12 papers. Green perception appears with 12 papers. Lack of procurement systems appears with 10 papers. Lack of resources appears with 10 papers. Readiness and demand for green products appears with 10 papers. Lack of monitoring and evaluation appears with 9 papers. Lack of communication appears with 8 papers. Lack of standards and practices for G P P appears with 8 papers. Inadequate procedure for procurement appears with 6 papers. Ambiguous criteria appears with 6 papers. Enforcement and compliance appears with 6 papers. Relationship among stakeholders appears with 6 papers. Poor record keeping appears with 4 papers. Inadequate specification issues appears with 4 papers. Innovation and technology appears with 4 papers. Corruption appears with 3 papers. Lack of industry support and inadequate supplier capacity appears with 3 papers. Ethical concerns appears with 1 paper. A cumulative percentage line increases across the barriers and reaches approximately eighty percent at the barrier category labelled Lack of resources. The cumulative value reaches one hundred percent at the final barrier category Ethical concerns.Pareto chart for barriers to GPP performance evaluation