To help humans in making decisions, decision support system (DSS) commonly apply concepts based on logic and mathematics which are often perceived as hard to handle. Feedback mechanisms providing decisional guidance are suggested to be viable means to solve the problem and render DSS into extended DSS. While known to be effective to enhance decision making in a more human centric way, guiding feedback mechanisms are still rarely implemented in DSS. This is suggested due to the lack of practically implementable design guidelines. This paper presents a preliminary framework based on four layers of human computer interaction (HCI) interface design, which comprises the insights gained in a systematic literature review on DSS feedback mechanisms from a HCI perspective.