While there are newer versions available (under the Siemens EDA brand),

As of 2025, Siemens EDA has released Questa 2022, 2023, and 2024 versions with support for UVM 1.4, IEEE 1800-2017, and native UVM-ML interoperability. So why discuss ?

However, QuestaSim 10.7c is not without its challenges. The tool’s licensing model is notoriously complex and expensive, often segmented by feature sets (e.g., Questa Core vs. Questa Advanced). Furthermore, its graphical user interface (GUI), while powerful, has a steep learning curve compared to more modern, lightweight simulators. A novice engineer can compile a design in a few commands, but mastering the debugging flow—setting conditional breakpoints, scripting complex checks, and interpreting coverage data—requires months of training.

The adoption of QuestaSim 10.7c offers numerous benefits to IC designers and verification engineers, including:

. This is critical for modern design environments where different blocks of a chip might be written in different languages. 2. High-Performance Simulation

Transaction-level modelling became mainstream with 10.7c. The tool provides native support for TLM-2.0 blocking and non-blocking transport interfaces, allowing architects to simulate virtual prototypes of entire SoCs at speeds exceeding 100 million instructions per second—orders of magnitude faster than RTL simulation.