Final answer:
The model designed as an abundance-based, bottom-up, positive approach is Appreciative Inquiry, which focuses on leveraging organizational strengths.
Step-by-step explanation:
The model that is specifically designed as an abundance-based, bottom-up, positive approach is Appreciative Inquiry. Unlike other management models that may focus on addressing problems or weaknesses, Appreciative Inquiry is constructed around identifying and leveraging the strengths and potential within an organization. It embraces a holistic perspective that seeks to understand and promote the factors that contribute to an organization's success, rather than solely focusing on what needs fixing. This approach aligns with the strengths-based management style developed by Donald Clifton, which highlights the importance of building on an individual's strengths to enhance organizational performance.