This action research aims to construct the Strategic Planning Process as an organization development intervention (ODI) for small organizations in Myanmar. This is a case of a Small Enterprise in Myanmar. This study used mixed Methods, and Sample Size is 30. The researcher used a Structured Close-ended Questionnaire for Quantitative Analysis and Content Analysis methods for One-on-One Interview Questions. All the questionnaires were collected digitally with the use of Microsoft Office Form and perform the descriptive analysis and Paired Sampled T-Test with IBM SPSS software and interview questions were also coded and analyzed with the help of MAXQDA 2020 software to find the impact and determine the improvement of Management Functions, Employee Engagement, and Team Cohesiveness. The research Hypotheses are to determine whether there is a Statistically Significant Impact of Intervention and Management Functions, Employee Engagement and Team Cohesiveness or not. This study identified the current situation of the small company using SWOT analysis, Trust Index Survey, and McKinsey 7S Analysis. Strategic Planning was designed and implemented throughout the Intervention process, and the researcher proved the impact of OD Intervention (Strategic planning) on Management Functions, Employee Engagement, and Team Cohesiveness. A collaboratively created Vision, Missions, and Core Value of the company emerged. The finding and result show the statistically significant improvement of these three dependent variables at Pre and Post ODI in this study. Advice for small enterprises is to implement the strategic planning process at the beginning of the business life cycle to improve Management, engagement, and teamwork.

Keywords : Strategic Planning, Management Functions, Employee Engagement, Team Cohesiveness, STEAM Education, Myanmar, Small Enterprise.