可用性指南：优化用户体验
2.3 规范任务序列
相关重要指数：4级
证据强度：5级
文件类型：指南
主题：
常规用户体验
指南：
允许用户在相似条件下以相同的顺序和方式完成任务。
注释：
用户可以学习特定的行为，并在能可靠地重复这些行为时表现最佳。例如：用户习惯在左侧或右侧面板查找附加信息。此外，用户还很熟悉搜索或结账流程的步骤。
资源：
1. Bovair, S., Kieras, D.E., & Polson, P.G. (1990). The acquisition and performance of text-editing skill: A cognitive complexity analysis. Human-Computer Interaction, 5(1),1-48.
2. Czaja, S.J., & Sharit, J. (1997). The influence of age and experience on the performance of a data entry task. Human Factors and Ergonomics Society Annual Meeting Proceedings, 144-147.
3. Detweiler, M.C. & Omanson, R.C. (1996). Ameritech Web Page User Interface Standards and Design Guidelines. Ameritech (now SBC).
4. Foltz, P.W., Davies, S.E., Polson, P.G., & Kieras, D.E. (1988). Transfer between menu systems. Proceedings of CHI’88, 107-112.
5. Kieras, D. (1997). A guide to GOMS model usability evaluation using NGOMSL (Chapter 31). In M. Helander, T.K. Landauer & P.V. Prabhu (Eds.), Handbook of Human-Computer Interaction. Amsterdam: North-Holland Elsevier Science Publishers.
6. Polson, P.G. & Kieras, D.E. (1985). A quantitative model of the learning and performance of text editing knowledge. Proceedings of CHI’85, 207-212.
7. Polson, P.G., Bovair, S., & Kieras, D. (1987). Transfer between text editors: Predictive cognitive modeling. Proceedings of CHI+GI’87, 27-32.
8. Polson, P.G., Muncher, E., & Engelbeck, G. (1986). A test of a common elements theory of transfer. Proceedings of CHI’86, 78-83.
9. Smith, J.A., Bubb-Lewis, C., & Suh, Y. (2000, June). Taking order status to task: Improving usability on the ibuy Lucent Web site. Proceedings of the 6th Conference on Human Factors and the Web. Retrieved November 2005.
10. Sonderegger, P., Manning, H., Souza, R.K., Goldman, H., & Dalton, J.P. (1999, December). Why most B-to-B sites fail. Forester Research.
11. Ziegler, J.E., Hoppe, H.U., & Fahnrich, K.P. (1986). Learning and transfer for text and graphics editing with a direct manipulation interface: Transfer of user skill between systems. Proceedings of CHI’86, 72-77.
糟糕的例子：
整个网站的日期选择下拉框应是一致的，而在下边的例子中，网站其他页面都是直接在页面上显示日历，而有一个页面是以“弹窗”的形式。应避免这种让用户感到困惑的情况。
