Michael Eraut (2004) has produced a paper on Informal Learning in the Workplace

This paper focuses mainly on theoretical frameworks for understanding and investigating informal learning in the workplace, which have been developed through a series of large and small scale projects. Two types of framework are discussed. The first group seek to deconstruct the “key concepts” of informal learning, learning from experience, tacit knowledge, transfer of learning and intuitive practice to disclose the range of different phenomena that are embraced by these popular terms. The second group are frameworks for addressing the three central questions that pervaded the research programme; what is being learned, how is it being learned, and what are the factors that influence the level and directions of the learning effort.