Update README.md

Data dictionary added

README.md

@@ -6,4 +6,13 @@ tags:
 - sales,
 - engines
 - predictive_maintenance
----
+---
+
+# Data Dictionary
+- `Engine_RPM`: The number of revolutions per minute (RPM) of the engine, indicating engine speed. It is defined in Revolutions per Minute (RPM).
+- `Lub_Oil_Pressure`: The pressure of the lubricating oil in the engine, essential for reducing friction and wear. It is defined in bar or kilopascals (kPa)
+- `Fuel_Pressure`: The pressure at which fuel is supplied to the engine, critical for proper combustion. It is defined in bar or kilopascals (kPa)
+- `Coolant_Pressure`: The pressure of the engine coolant, affecting engine temperature regulation. It is defined in bar or kilopascals (kPa)
+- `Lub_Oil_Temperature`: The temperature of the lubricating oil, which impacts viscosity and engine performance. It is defined in degrees Celsius (°C)
+- `Coolant_Temperature`: The temperature of the engine coolant, crucial for preventing overheating. It is defined in degrees Celsius (°C)
+- `Engine_Condition`: A categorical or numerical label representing the health of the engine, potentially indicating normal operation or various levels of wear and failure risks. It is defined as a categorical variable (0/1) representing a state such as "0 = Off/False/Active" and "1 = On/True/Faulty"