Full Stack Transformations: Do they work and is there an alternative?

The IT systems that power the businesses of communications service providers (CSPs) have always been subject to regular change. Traditionally this was achieved through a process called “full stack” transformation – replacing complete, vertically integrated suites of applications (or stacks). But there may be a better option. Full stack transformations tend to be complex and unwieldy, so CSPs are seeking alternatives that will help them be more agile. With the advent of decoupled, modular, API-enabled architectures, operators increasingly are choosing to replace only those parts of an application that bring additional business value. This report looks at the pros and cons of full stack transformation and evaluates a modular alternative, with special focus on how TM Forum members are collaborating to create standards and best practices for a modern architecture. Read it to understand:

• The limitations of full stack transformation
• How a modular approach reduces time to market and business value
• The key architectural approaches and technologies that enable modular transformation
• Why centralized catalogs are important
• Migration strategies to minimize disruption for the business and customers
• How TM Forum’s Open Digital Architecture and Open APIs can help CSPs and suppliers make the transition
• How companies like Telenor, Telus and Vodafone are benefitting from a modular approach