Meet the expectations listed below:
1. Object Selection & Scale
Complexity Rule: The object must consist of at least 3 distinct parts (e.g., a mallet, a hand plane, a small birdhouse, or a marking gauge).
Proportion: The sketch must be drawn to scale relative to the paper. While not a measured drawing, the parts must look "correct" in size compared to one another.
2. Technical Isometric Standards (The "30/90 Rule")
Vertical Lines: All vertical edges of the object must be drawn at 90 degrees (straight up and down).
Horizontal Receding Lines: All lines representing width or depth must be at 30 degrees from the horizontal.
Parallelism: If two edges are parallel on the physical object, they must remain parallel in your drawing. No "vanishing point" perspective.
Length Consistency: Lines representing equal lengths on the object (e.g., the four corners of a square block) must be drawn at equal lengths on the page.
3. Exploded View Alignment (The "Tether" Rule)
Axis Orientation: Parts must be "exploded" along one of the three isometric axes (30° left, 30° right, or 90° vertical). Do not move parts at random angles.
Path of Assembly: Parts should be moved far enough apart that they do not overlap, but close enough that the relationship between them is clear.
Alignment Lines (Optional but Recommended): Use light, dashed "tether lines" to show exactly where the part would slide back into place. These lines must also follow the 30/90 rule.