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Given the growth in the number and size of Web Applications worldwide, Web quality assurance, and more specifically Web usability have become key success factors. Therefore, this work proposes a usability evaluation technique based on the combination of Web design perspectives adapted from existing literature, and heuristics. This new technique is assessed using a controlled experiment aimed at measuring the efficiency and effectiveness of our technique, in comparison to Nielsen's heuristic evaluation. Results indicated that our technique was significantly more effective than and as efficient as Nielsen's heuristic evaluation.