Impact Assessment refers to the assessment done with the help of the Update Analyzer tool prior to applying the release update. The assessment is performed in order to assess the impact to existing customizations from the release update that the customer is planning to upgrade to.
Behavior of the Release Update Studio Navigator
The first step of the Release Update process will be the Impact Assessment and at the initial landing on the Release Update Studio homepage, the two buttons; “Impact assessment” and “Apply Release Update” will be enabled in the navigator (Figure 1.1).
|Figure 1.1 - Navigator of the Release Update Studio|
A user who wishes to skip the impact assessment, can do so by clicking on the “Apply Release Update” button straightaway. However, the confirmation message (Figure 1.2) recommends the assessment to be run before applying the release update.
|Figure 1.2 - Confirmation Message when Impact Assessment is skipped|
If the assessment has already been performed, the user shall select “Yes” and then move on to the next step of the Release Update process, which is to apply the release update.
Trigger Impact Assessment from the Release Update Studio
If the assessment has not yet been performed, the user shall select “No” and then click on the “Impact Assessment” button to trigger the assessment.
A click on the “Impact Assessment” button will open a dialog box with the following information (Figure 1.3) :
- The purpose of performing an Impact Assessment 
- A step-by-step guide on how perform the assessment with pre-requisites 
- A drop down to select the target release update version tag 
- The latest service update for the release update version selected 
- Download button 
- Cancel button 
|Figure 1.3 - Impact Assessment Dialog box|
Once the target version tag is selected from the dropdown , the ‘Download’ button  can be clicked, to download the .upda file. The file should be downloaded within two – three seconds.
The file will be stored in the ‘Download’ folder of the user’s machine.
The ‘Cancel’ button  will close the dialog box and will navigate the user back to the Release Update Studio homepage to allow the user to perform other actions.
The Effect on the Release Update Summary Table
If the file is successfully downloaded, the status of the Impact Assessment record in the Release Update Summary table will be marked as “Initialized” .
The Release Update summary table will further record the “Date started” field  with the date the .upda file download was triggered and the “Last Modified By”  field with the email ID of the user who triggered the impact assessment (Figure 1.4).
|Figure 1.4 - Release Update Summary table updated with the Impact Assessment progress|
If the file fails to download, the status will be marked as “Failed” in the Release Update Summary table (Figure 1.5) and the user is required to download the .upda file once again.
|Figure 1.5 - Impact Assessment status recorded as "Failed" in the Release Update Summary table|
A comment relevant to the Impact Assessment step can be added by following the flow in the following section.
The Parameters of the .upda file
The .upda file includes the repository information needed for the update analyzer to run the assessment. The parameters included in the file are (Figure 1.6):
- The Base tag 
- The Target tag 
- Core Code Repository URL 
- Solution Repository URL 
- The branch name 
|Figure 1.6 - Parameters included in the .upda file|
Trigger Impact Assessment using Update Analyzer
To run the assessment, the Update Analyzer tool needs to be installed in the user’s machine. Please refer Update Analyzer Installation Steps to find the step-by-step guide on how to install the Update Analyzer tool.
On a machine which has pre-installed Update Analyzer, the file can be opened by double-clicking or by selecting the option “Open with Update Analyzer”.
The file will then open in Update Analyzer and will start cloning the repositories and will then run the impact assessment (Figure 1.7). The process will continue for approximately 20-30 minutes and complete.
|Figure 1.7 - Update Analyzer cloning the repositories|
At the completion of the assessment, a report will be generated with an overview of layer and interface impacts, categorized by the severity of the impacted files as high, low, no, and unknown files (Figure 1.8).
|Figure 1.8 - Overview of Layer and Interface Impacts|
Further, by clicking on one of the rows, a detailed diff analysis of those files can be viewed.
A user can perform an impact assessment at any given point of the Release Update process, and therefore the “Impact Assessment” button will be enabled throughout.