The old syllabus had "Decision Making Techniques." The new syllabus expands this to The 5th edition dedicates significant space to:
Purpose: a concise, exam-focused study plan and practical tips assuming you’re using Paul Hoang’s IB Business Management 5th edition PDF as the primary resource. ib business management textbook paul hoang pdf 5th edition
Many high schools now bundle the Hoang 5th edition via institutional licenses. Ask your IB coordinator if your school provides access. The old syllabus had "Decision Making Techniques