Human resource development (HRD) specialists are searching for instructional design models that accommodate e-learning platforms. Van Merrienboer proposed the four-component instructional design model (4C/ID model) for competency-based education. The model's basic message is that well-designed learning environments can always be described in terms of the following interrelated blueprint components: (1) learning tasks (concrete, authentic "whole-task experiences") that are provided to learners; (2) supportive information (information that is supportive to the learning and performance of nonroutine aspects of learning tasks such as reasoning and problem solving); (3) just-in-time information (information that is prerequisite to the learning and performance of routine aspects of learning tasks); and (4) part-task exercise (additional exercises for routine aspects of learning tasks requiring a high level of automaticity). The components of the 4C/ID model can be identified in almost all blueprints of integrated learning, including integrated e-learning, and they are particularly well suited to case-based and project-based approaches to instruction and combinations of the two approaches. Cases can be constructed by carefully analyzing how professionals work as they perform tasks or solve problems. The range of project-centered learning is based on the following dimensions: (1) authenticity of the problem; (2) extent of control; and (3) level of implementation. (MN)