[PC-1556] - PMC MTBF information (datasheet) (#1745)

* Content update (MTBF table initial commit)

* Content update (MTBF information update)

* Content update (MTBF table information)

* Content update (MTBF section information update)

* Content update (MTBF table information update)

---------

Co-authored-by: José Antonio Bagur Nájera <josea.bagur@gmail.com>

Author: ArduinoBot

content/hardware/05.pro-solutions/solutions-and-kits/portenta-machine-control/datasheet/datasheet.md

@@ -443,6 +443,18 @@ Now that you have gone through the basics of what you can do with the board you
 | 4   | ID              |
 | 5   | GND             |
 
+## Mean Time Between Failure (MTBF)
+
+MTBF, which stands for Mean Time Between Failure, is calculated according to statistical device failures and indicates the reliability of a device.
+
+The MTBF figure (in hours/years) for the Portenta Machine Control can be found in the table below. The MTBF figure was calculated according to the MIL-HDBK-217F part count method.
+
+|  **Standard** | **Portenta Machine Control** | **Environmental Conditions** |
+|:-------------:|:----------------------------:|:----------------------------:|
+| MIL-HDBK-217F |       513550 h/58 years      |             25 ºC            |
+
+**Important note**: MTBF is the statistical representation of the likelihood of a unit failing and _does not necessarily represent a product's life_. 
+
 ## Mechanical Information
 ### Board Outline
 
@@ -547,11 +559,12 @@ Hereby, Arduino S.r.l. declares that this product is in compliance with essentia
 
 ## Revision History
 
-| **Date**    | **Revision** | **Changes**                           |
-| ----------- | ------------ | ------------------------------------- |
-| 08/05/2023 | 6            | RTD and Thermocouples new information |
-| 11/04//2023 | 5            | Updates and table improvements        |
-| 13/10/2022  | 4            | Big improvements & Fixes |
-| 26/09/2022 | 3            | Fix features indentation, update analog output diagram, fix format issues and update images reflecting the location change of the MAX31855KASA+T converter (top side)                              |
-| 09/05/2022 | 2            | Remove PT1000, not compatible         |
-| 13/04/2021  | 1            | First Release                         |
+| **Date** | **Revision** | **Changes** |
+|---|:---:|---|
+| 06/02/2024 | 7 | MTBF information |
+| 08/05/2023 | 6 | RTD and thermocouples new information |
+| 11/04//2023 | 5 | Updates and table improvements |
+| 13/10/2022 | 4 | Big improvements and fixes |
+| 26/09/2022 | 3 | Fix features indentation, update analog output diagram, fix format issues and update images reflecting the location change of the MAX31855KASA+T converter (top side) |
+| 09/05/2022 | 2 | Remove PT1000, not compatible |
+| 13/04/2021 | 1 | First release |