Resolve a Shared-Space Timing Conflict

Supplied materials

• Paper and a pencil, typed notes or a browser scratch area. Color names can replace colored supplies; drawn figures and timelines can replace performance.
• Complete teaching inputs: A paper scene map has one narrow crossing at coordinate 3. Two figures begin at1 and5; the brief prohibits simultaneous crossing. Which blocking schedule meets it? Supplied candidates: (A) A crosses while B waits; B crosses after A clears (B) Both enter the crossing at exactly the same count (C) Make the crossing narrower while preserving simultaneous travel (D) Remove timing cues and assume both plans fit.
• Independent check: A paper scene map has one narrow crossing at coordinate 4. Two figures begin at2 and6; the brief prohibits simultaneous crossing. Which blocking schedule meets it? Supplied candidates: (A) A crosses while B waits; B crosses after A clears (B) Both enter the crossing at exactly the same count (C) Make the crossing narrower while preserving simultaneous travel (D) Remove timing cues and assume both plans fit.

Learn the idea

Explain why a candidate satisfies its actual constraints. Analyze a supplied chord third, retain rhythm while changing one motif pitch, separate access to a shared crossing and turn a rehearsal note into a targeted revision. A blocking schedule combines place and time. If two planned paths share one narrow crossing and the brief forbids simultaneous use, separate their access rather than ignoring the timing conflict.

Reason through the supplied case: The shared crossing is a spatial constraint, so the schedule separates access in time. Waiting until A clears avoids the prohibited simultaneous use. This is a paper-plan check; actual movement should stay comfortably small or be represented by drawings, with no running or collision rehearsal.

Complete the task with a paper map. No actual collision rehearsal, running or furniture movement is required, and a written schedule is not proof of safe real-space execution.

1. Read the complete teaching inputs and mark the feature, rule or constraint being tested.
2. Compare the model decision with one rejected candidate; state the visible evidence or calculation that distinguishes them.
3. Solve the independent check and the three changed-input practice cases before reading feedback.
4. Draw two paper paths through one shared crossing and score A crossing before B begins to cross.
5. Check your artifact against these explicit criteria: The shared location is labeled and B waits until A has cleared under the stated timing plan.

Check your reasoning

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Take it further

New-input analysis: A paper scene map has one narrow crossing at coordinate 10. Two figures begin at8 and12; the brief prohibits simultaneous crossing. Which blocking schedule meets it? Supplied candidates: (A) A crosses while B waits; B crosses after A clears (B) Both enter the crossing at exactly the same count (C) Make the crossing narrower while preserving simultaneous travel (D) Remove timing cues and assume both plans fit. Expected relationship: A crosses while B waits; B crosses after A clears. The shared crossing is a spatial constraint, so the schedule separates access in time. Waiting until A clears avoids the prohibited simultaneous use. This is a paper-plan check; actual movement should stay comfortably small or be represented by drawings, with no running or collision rehearsal. Create your own artifact: Draw two paper paths through one shared crossing and score A crossing before B begins to cross. Completion criteria: The shared location is labeled and B waits until A has cleared under the stated timing plan.

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