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According to CHPPM officials , obstacles to the services ' reporting compliance may have included a lack of understanding by some within the deployed military services about the type of OEHS reports that should have been submitted . The group engaged in a process designed to build relationships and allow participants to identify common goals , reasons to work together , obstacles to overcome , and a plan of action . There are , however , obstacles to be overcome before this vision can be realized . The study of development is surrounded by debate about its driving forces , its facilitating and inhibiting conditions , obstacles to its achievement , and the appropriate agents for bringing it about . Included is a discussion of needs assessment of teachers , goals for staff development programs , models and strategies , obstacles to implementation , and the evaluation of such programs .