Specifications
CHAPTER 1: DESIGN FLOW
COMMAND-LINE DESIGN FLOW
22 ■ INTRODUCTION TO QUARTUS II ALTERA CORPORATION
Attempt Similar 
Placement flow
Performs a full compilation on a 
previously compiled design 
where the Fitter compares the 
netlist and placement from the 
previous and current 
compilations. The Fitter compares 
the compilations in order to use 
as many node placements from 
the previous compilation as 
possible in the current 
compilation.
attempt_similar_placement
SignalProbe flow Routes user-specified signals to 
output pins without affecting the 
existing fitting in a design, so that 
you can debug signals without 
completing a full compilation.
signalprobe 
Early Timing 
Estimate
Performs a partial compilation, 
but stops and generates early 
timing estimates before the Fitter 
is complete.
early_timing_estimate
Partition Merge
Merges the design partitions after 
incremental synthesis to create a 
flattened netlist for use in further 
stages of compilation.You must run 
this command if you are using 
incremental synthesis and do not 
fully recompile the design after you 
make design changes.
merge
Table 4. Command-Line Compiler Flows (Part 2 of 2)
Flow Description
Command-Line Option for 
quartus_sh --flow or 
execute_flow
f
For Information About Refer To
Using compilation flows “Overview: Using Compilation Flows” in 
Quartus II Help










