# Master data change initiated by NB (responsible) — View MSB ## Process flow from the perspective of the MSB \nSystem diagram: Stammdatenänderung vom NB (verantwortlich) ausgehend — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSB\n\nMarket partner\n\n\n\n3. Antwort auf Änderung vom\nNB an den LF\n\nNB\n\nAS4\n44113\n\nLoad data for the incoming\ncheck\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\nAPERAK check: Z10, Z17,\nZ18\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nEBD check: G_0016\nNicht bila. rel. Ändeung vom\nNB\n\n\nTrigger follow-up process:\n44115\n\n\nTriggered by incoming\nmessage: 44113\n\n\n4. Antwort auf Änderung vom\nNB an MSB\n\n\nNB\n\nAS4\n44115\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Stammdatenänderung vom NB (verantwortlich) ausgehend — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSB\n\n\nNB\n\n\nLF\n\n\n1. Änderung vom NB an den LF\nAS4 · PI 44112, 44123, 44175\n\n2. Änderung vom NB an MSB\nAS4 · PI 44115, 44124, 44176 · E_3010\nE_3010 — Änderung vom NB prüfen\n\n3. Antwort auf Änderung vom NB an den LF\nAS4 · PI 44113\n\nCreate transaction\nCreate process data\n\n4. Antwort auf Änderung vom NB an MSB\nAS4 · PI 44115 · E_3021\nE_3021 — Änderung vom NB prüfen\n\nUpdate transaction\nUpdate process data\n"} titel="MSB" /> ## Process steps ### Change from the NB to the LF This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [44112](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44112) — Non-bal.rel. change from NB · AS4 - [44123](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44123) — Bal.-rel. change from NB with dependencies · AS4 - [44175](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44175) — Change to the market location structure · AS4
### Change from the NB to MSB This step runs between other market partners and is not relevant for this view.
**Check identifiers** - [44115](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44115) — Response to change from NB · AS4 - [44124](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44124) — Response to change from NB · AS4 - [44176](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44176) — Response to change to the market location structure · AS4
**Response per decision tree** - `44115`, `44124`, `44176` → [E_3010](/en/referenz/202610/ebd/E_3010) · Check change from the NB
### Response to change from the NB to the LF
**Check identifiers** - [44113](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44113) — Non-bal.rel. change from NB · AS4
**Flow**
  1. Message from **NB** · AS4
  2. **Load data for the incoming check** - [Read market location](/en/api/202610/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it - [Read metering location](/en/api/202610/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  3. **APERAK checks** - `44113` → `Z10` - `44113` → `Z17` - `44113` → `Z18`
  4. **Write endpoint** - Transaction created — [Create process data](/en/api/202610/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.
  5. **Decision tree** - `44113` → `G_0016` — Not bila. rel. change from the NB
  6. **Trigger follow-up process** - [44115](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44115) — Response to change from NB After processing, the MACO APP starts this follow-up process itself.
### Response to change from the NB to MSB
**Check identifiers** - [44115](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44115) — Response to change from NB · AS4
**Flow**
  1. **Triggered by incoming message** - [44113](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44113) — Non-bal.rel. change from NB The MACO APP sends this message itself, as a follow-up process after this incoming message.
  2. Message to **NB** · AS4
    **Response per decision tree** - `44115` → [E_3021](/en/referenz/202610/ebd/E_3021) · Check change from the NB
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/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 this process | EBD | Name | |---|---| | [E_3021](/referenz/202610/ebd/E_3021) | Check change from the NB | | [E_3010](/referenz/202610/ebd/E_3010) | Check change from the NB |
## Process information
  1. ### Trigger **Runs beforehand:** [Billing data for balancing group settlement](/en/prozessdoku/202610/LF/GPKE-Teil2-abrechnungsdaten-bilanzkreisabrechnung), [Start of replacement supply / default supply](/en/prozessdoku/202610/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/202610/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/202610/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/202610/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/202610/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/202610/LF--LFA/GPKE-Teil2-lieferbeginn), [End of supply from NB to LF](/en/prozessdoku/202610/MSB/GPKE-Teil2-lieferende-von-nb-an-lf), [Creation](/en/prozessdoku/202610/LF/GPKE-Teil2-neuanlage), [Transmission of the calculation formula](/en/prozessdoku/202610/MSB/WiM-Teil2-uebermittlung-der-berechnungsformel) — these processes name the one shown here in their result.
  2. ### First message **NB** sends “Response to change from NB to the LF” (step 3). From here on, it is the turn of the party involved on this page.
## 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/202610/LF/geli-gas-2-0-stammdatenanderung-vom-nb-verantwortlich-ausgehend) — LF - [View NB](/en/prozessdoku/202610/NB/geli-gas-2-0-stammdatenanderung-vom-nb-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. ::: 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: [3](#schritt-3), [4](#schritt-4)