Agile methods have been suggested as a means to meet the challenges in large sys­tems’ development, in particular large-scale development of software. However, with in­creasing scale, limitations of agile methods begin to materialize. To this end, we outline an integration driven development (IDD) approach that combines plan-driven, incremental develop­ment with agile methods. The planning is based on a visualization of dependencies between needed system changes – deltas – called the anatomy. The IDD approach originated in the Ericsson telecom practice more than a decade ago, and is now used regularly in large system develop­ment projects.