# Master data change initiated by LF (responsible) — View MSB ## Process flow from the perspective of the MSB \nSystem diagram: Stammdatenänderung vom LF (verantwortlich) ausgehend — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB\n\nMarket partner\n\n\n\n2. Änderung vom LF\n(Weiterleitung an MSB)\n\nNB\n\nAS4\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\n4. Antwort auf Änderung vom\nLF\n\n\nNB\n\nAS4\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Stammdatenänderung vom LF (verantwortlich) ausgehend — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB\n\n\nLF\n\n\nNB\n\n\n1. Änderung vom LF\nAS4 · PI 44109, 44120\n\n2. Änderung vom LF (Weiterleitung an MSB)\nAS4\n\nCreate transaction\nCreate process data\n\n3. Antwort auf Änderung vom LF\nAS4 · PI 44111, 44121 · E_3011\nE_3011 — Änderung vom LF prüfen\n\n4. Antwort auf Änderung vom LF\nAS4\n\nUpdate transaction\nUpdate process data\n"} titel="MSB" /> ## Process steps ### Change from the LF This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [44109](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44109) — Non-bal.rel change from LF · AS4 - [44120](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44120) — Bal.-rel. change from LF · AS4
### Change from LF (forwarding to MSB)
**Transmission** AS4
**Flow**
  1. Message from **NB** · AS4
  2. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-msb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
### Response to change from the LF This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [44111](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44111) — Response to change from LF · AS4 - [44121](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44121) — Response to change from LF · AS4
**Response per decision tree** - `44111`, `44121` → [E_3011](/en/referenz/202604/ebd/E_3011) · Check change from the LF
### Response to change from the LF
**Transmission** AS4
**Flow**
  1. Message to **NB** · AS4
  2. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
Decision trees of the other parties involved | EBD | Name | |---|---| | [E_3011](/referenz/202604/ebd/E_3011) | Check change from the LF |
## Process information
  1. ### Trigger **Runs beforehand:** [Start of replacement supply / default supply](/en/prozessdoku/202604/LF/GPKE-Teil2-beginn-der-ersatz-grundversorgung), [Case 1: LF assignment for EEG market location without DV obligation or KWKG market location without DV obligation](/en/prozessdoku/202604/LF/GPKE-Teil2-fall-1-lf-zuordnung-bei-eeg-marktlokation-ohne-dv-pflicht-bzw-kwkg-marktlokation-ohne-dv-pflicht), [Case 2: LF assignment for EEG market location with DV obligation](/en/prozessdoku/202604/LF--LFA/GPKE-Teil2-fall-2-lf-zuordnung-bei-eeg-marktlokation-mit-dv-pflicht), [Case 3: LF assignment for KWKG market location with DV obligation or non-EEG / non-KWKG market location and the market location is mapped without tranches](/en/prozessdoku/202604/LF--LFA/GPKE-Teil2-fall-3-lf-zuordnung-bei-kwkg-marktlokation-mit-dv-pflicht-bzw-nicht-eeg-nicht-kwkg-marktlokation-und-marktlokation-wird-nicht-tranchiert-abgebildet), [Case 4: LF assignment for KWKG market location with DV obligation or non-EEG / non-KWKG market location and the market location is mapped with tranches](/en/prozessdoku/202604/LF--LFA/GPKE-Teil2-fall-4-lf-zuordnung-bei-kwkg-marktlokation-mit-dv-pflicht-bzw-nicht-eeg-nicht-kwkg-marktlokation-und-marktlokation-wird-tranchiert-abgebildet), [Start of supply](/en/prozessdoku/202604/LF--LFA/GPKE-Teil2-lieferbeginn), [Creation](/en/prozessdoku/202604/LF/GPKE-Teil2-neuanlage) — these processes name the one shown here in their result.
  2. ### First message **NB** sends “Change from LF (forwarding to MSB)” (step 2). From here on, the party involved on this page has the next move.
## Other views of the process The same process through the eyes of the other parties involved: the same steps, each read from their point of view. - [View LF](/en/prozessdoku/202604/LF/geli-gas-2-0-stammdatenanderung-vom-lf-verantwortlich-ausgehend) — LF - [View NB](/en/prozessdoku/202604/NB/geli-gas-2-0-stammdatenanderung-vom-lf-verantwortlich-ausgehend) — NB *The source provides no use case profile for this process — objective, precondition and result are not recorded there.* *The steps are the **possible** messages of this process, not a sequence — the source lists neither conditions nor alternatives. The small box on the step names the own view on the left: with **←** it receives, with **→** it sends. Collapsed steps run between other market partners.* :::caution{title="Step sequence reconstructed"} For this process, the BNetzA consolidated version carries no sequence diagram. The steps are reconstructed from the BDEW check identifier table: grouped by the designation, ordered by the process step. The method agrees with the consolidated version in 200 of 200 cases that can be cross-checked — the individual line is nevertheless not editorially reviewed. Check it against the rulebook before adopting it into an implementation specification. ::: The connector table lists no write call for these steps. Derived from the process flow: the process begins for the own role with their message, so the transaction is created. Applies to: [2](#schritt-2) For the check identifiers of these steps there is no test case in the test data set; the »Try it out« button of the write interface therefore offers no body. Applies to: [2](#schritt-2), [4](#schritt-4)