Many companies facing digitalisation lack a digital target model or transformation/implementation roadmap. Multinational companies as well as SMEs have to deal with different global market trends. Besides volatility, uncertainty, complexity and ambiguity [VUCA], companies' business models are constantly being influenced by disruptive technologies and solutions. And all this comes along with Industry 4.0 and digitalisation itself. Yet I4.0 and digitalisation are in many companies still buzzwords and lack substance. Assuming that the level of digitalisation of an enterprise has been defined, the main question is: "What does the digitalisation journey look like, and what are the transformation roadmap and the interdependencies?" This paper investigates whether, when and which of the independencies of company's functions are being neglected in the implementation of digitalisation. In a systematic literature review, gaps were identified especially in three previously defined categories that are directly related to the implementation of digitalisation, namely corporate culture, leadership and technology. After identification of these gaps, the missing link between these categories was discussed. In this way, the gaps revealed in the literature could be filled. The further scientific elaboration will primarily serve as a guide for SMEs to ensure a smooth implementation of digitalisation in the company.

Keywords
SMEs, Digitalisation, Transformation Roadmap, Industry 4.0.