Background:
InTime considers every timing slack type in its calculation of TNS (Total Negative Slack). In the following screenshot (Figure 1) from the Quartus-II software, the Design-wide TNS consists of Setup and Recovery slack components for this design. 
Figure 1: Timing results
If Recovery slack is counted, the TNS is -94.725 + -9.255 = -103.98 ns. Otherwise, the TNS is -94.725 ns. By default, InTime considers all slack components when calculating the TNS (see Figure 2 below). 
Figure 2: TNS that includes Recovery slack
However, some users may not care about Recovery slack (or other slack types) at all, and think that the TNS should include only Setup and Hold timing. ### Solution:
In InTime\'s GUI, go to File > Settings > Vendor Toolchains > Intel Quartus-II/Quartus Prime and uncheck the appropriate item. 
Figure 3: Include Recovery and Removal slack
Figure 4: Exclude Recovery and Removal slack
Alternatively, in the Tcl console, enter:
<pre left="" style="text-align:">flow set goal_quartusii_enable_recovery_time_in_tns falseIn subsequent results, the TNS calculation will be adjusted accordingly (see Figure 5). 
Figure 5: TNS that excludes Recovery slack
Applies to:
- Quartus-II
- Linux Operating System
- Windows Operating System
Knowledge Base ID: 201702071 - Last Review: Feb 07, 2017 - Revision: 1.0