diff --git a/docs/src/docs/arc42/runtime-view/ess-top-down/irs-recursive.adoc b/docs/src/docs/arc42/runtime-view/ess-top-down/irs-recursive.adoc
new file mode 100644
index 0000000000..741236d5bc
--- /dev/null
+++ b/docs/src/docs/arc42/runtime-view/ess-top-down/irs-recursive.adoc
@@ -0,0 +1,5 @@
+The IRS recursive approach is a decentral approach of retrieving and aggregating data throughout the Catena-X network.
+
+The core functionality is based on notifications which are exchanged between multiple IRS instances. The notifications trigger an investigation on the next level down the supply chain and return aggregated data containing, e.g. simple information about whether a certain BPN is part of the supply chain or not.
+
+Investigations triggered on the next level down the supply chain can trigger further investigations themselves, hence the name _IRS recursive_.
\ No newline at end of file
diff --git a/docs/src/docs/arc42/runtime-view/full.adoc b/docs/src/docs/arc42/runtime-view/full.adoc
index 2e888ecc23..5c268c1504 100644
--- a/docs/src/docs/arc42/runtime-view/full.adoc
+++ b/docs/src/docs/arc42/runtime-view/full.adoc
@@ -15,6 +15,7 @@ include::irs-iterative/scenario-4.adoc[leveloffset=+2]
 This section covers the main processes of the IRS in a recursive scenario in a network.
 This recursive scenario is illustrated using the various use cases realized in the scenario.
 
+include::ess-top-down/irs-recursive.adoc[leveloffset=+1]
 include::ess-top-down/ess-top-down.adoc[leveloffset=+1]
 include::ess-top-down/ess-top-down-scenario-1.adoc[leveloffset=+2]
 include::ess-top-down/ess-top-down-scenario-2.adoc[leveloffset=+2]
diff --git a/docs/src/docs/arc42/runtime-view/index.adoc b/docs/src/docs/arc42/runtime-view/index.adoc
index 5a1d5235ff..f29a3f2b92 100644
--- a/docs/src/docs/arc42/runtime-view/index.adoc
+++ b/docs/src/docs/arc42/runtime-view/index.adoc
@@ -15,6 +15,7 @@ This section describes the iterative flow, the main processes of the IRS, and ex
 This section covers the main processes of the IRS in a recursive scenario in a network.
 This recursive scenario is illustrated using the various use cases realized in the scenario.
 
+include::ess-top-down/irs-recursive.adoc[leveloffset=+1]
 - xref:ess-top-down/ess-top-down.adoc[Use Case: ESS (Environmental and Social Standards) Top-Down approach]
 - xref:ess-top-down/ess-top-down-scenario-1.adoc[Scenario 1: Register an Ess-Investigation-Order]
 - xref:ess-top-down/ess-top-down-scenario-2.adoc[Scenario 2: Register an Ess-Investigation-Job]
diff --git a/docs/src/docs/arc42/runtime-view/irs-iterative/irs-iterative.adoc b/docs/src/docs/arc42/runtime-view/irs-iterative/irs-iterative.adoc
index ba7fe41999..b0fc6b071c 100644
--- a/docs/src/docs/arc42/runtime-view/irs-iterative/irs-iterative.adoc
+++ b/docs/src/docs/arc42/runtime-view/irs-iterative/irs-iterative.adoc
@@ -1,3 +1,9 @@
+IRS Iterative is the main IRS mode for retrieving data chains throughout the Catena-X network. The core functionality can be summed up in three steps:
+
+1. Start the process with a provided globalAssetId and BPN combination, and required submodels to request.
+2. Retrieve the EDC endpoint for the BPN, search the catalog for the Digital Twin Registry contract Offer and search the DTR for the provided BPN.
+3. Retrieve the relationship submodel for the requested lifecycle and direction and repeat step 1 with the globalAssetIds and BPNs from the relationship submodel linked data until the desired depth is reached or no more relationships could be found.
+
 [plantuml, target=overall, format=svg]
 ....
 include::../../../../uml-diagrams/runtime-view/api-call-asynchrous-sequence.puml[]