According to their website, TM Forum is
is the global industry association that drives collaboration and collective problem-solving to maximize the business success of communication and digital service providers and their ecosystem of suppliers."
They have worked extensively on creating a digital maturity model, defining the digital transformation journey and working with CSPs (Communication Services Providers) looking to become DSPs. In their model, there are 5 dimensions covering:
Across these dimensions, 110 criteria are identified, along with sub-dimensions, to assess how far along a CSP has come in its digital transformation journey, and how to assess its target objectives.
|TM Forum Digital Maturity Model|
The full model is members only, but there are a lot of additional resources for telecom professionals on their website, including videos and case studies. For people looking to understand digital transformation in the telecom industry, this is a good starting point.