diff --git a/Joss_Paper/paper.md b/Joss_Paper/paper.md
index b71017e..be96f8f 100644
--- a/Joss_Paper/paper.md
+++ b/Joss_Paper/paper.md
@@ -39,7 +39,7 @@ formatted weather data by providing a streamlined process.
 *Data conversion*: AixWeather converts this raw weather data from various sources into a defined core format and, from there, into the desired export format.
 
 *Data accuracy*: AixWeather ensures data accuracy by taking into account critical factors that are 
-often overlooked in custom solutions, including consideration of time zones, 
+often overlooked in custom solutions, which are specifically the consideration of time zones, 
 the time reference of the measurement, unit conversions, correct handling of incomplete data series 
 and, where possible, the avoidance of interpolation-related smoothing.
 
diff --git a/README.md b/README.md
index 07c7a06..1e9e0a4 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,10 @@ For background knowledge, check the below tool structure and overview.
 
 ## Tool structure and overview
 
-**This tool consists of three layers:**
+AixWeather is a tool for generating weather data for building energy system simulations. 
+It retrieves, formats, enriches, and ultimately exports weather data in various file formats.
+
+**This tool consists of three layers that are executed as a pipeline for each run:**
 
 1. Import raw weather data from several sources
 
@@ -66,8 +69,17 @@ For background knowledge, check the below tool structure and overview.
 
 3. Transform the core-format data to your desired output format
 
+Which transformations are executed, i.e. required, will always depend on the input data and the 
+desired output format.
+The current set of implemented transformation functions can be found in 
+[aixweather/transformation_functions](aixweather/transformation_functions).
+The tool selects the required transformation functions based on the input data and 
+the desired output format.
+
 **Overview**
 
+The below diagram shows the tool's structure and the data flow from the import to the output format.
+
 ![Weather Data Tool Diagram](docs/Overview_WeatherTool.png)
 
 **Known limitations:**