Business Process Modeling Notation

ConceptDraw PRO is a software for simplу depicting the business processes based on BPMN 2.0.
Business Process Diagrams Cross-Functional-Flowcharts, Workflows, Process Charts, IDEF0 and IDEF2, Timeline, Calendars, Gantt Charts, Business Process Modeling, Audit and Opportunity Flowcharts and Mind Maps (presentations, meeting agendas).

IDEF9 Standard

Use Case Diagrams technology. An effective management of changes is significantly facilitated by way of definition and documenting of business-requirements.