Interoperability is the ability of entities in organisation to work together that covers aspects ranging from the technical to the business level. Over the last decades, the interoperability concept and its context have been changing rapidly. It expands from the largely IT-focused area to business-focused area. The evaluation of interoperability is a rising concern in various research domains. There is increasing number of researchers that have been started concentrating on not just digital aspects, but also business related, human related, and social environment related aspects. Our previous investigation reveals in that interoperability issues from those perspectives are becoming a rising concern. When we study information sharing and business collaboration within organisations, the business activities and operations in organisation, which directly affect business performance, are driven by business processes. Therefore, the interoperability between business processes is the key to information sharing assurance. This paper proposes a framework from a new perspective - semiotics perspective, for enhancing interoperability evaluation. The framework derives from a feasibility study that investigates interoperability barriers in organisation. The framework offers the capabilities of analysing, measuring, and assessing the interoperability between business processes.