Build an integrated program roadmap across workstreams

Help me build an integrated roadmap for a program with several workstreams. Program goal: [OUTCOME and target date] Workstreams: [LIST each with its lead, scope, and key milestones with dates] Known dependencies between workstreams: [e.g. "Training can't start until the system is configured"] External dates: [regulatory deadlines, contract dates, business calendar events, freeze periods] Planning horizon and granularity: [e.g. "18 months, by month"] Steps: 1. Lay out each workstream's milestones on a common timeline. 2. Map cross-workstream dependencies and check each one: does the provider's date land before the consumer needs it? Flag conflicts and tight handoffs (less than 2 weeks of buffer). 3. Identify integration points - moments where outputs from several workstreams must come together (e.g. end-to-end testing, launch readiness) - and treat these as program-level milestones. 4. Find periods of overload where several workstreams peak at once and compete for the same people or approvals. 5. Suggest program-level checkpoints for leadership review. Rules: keep each workstream's dates as given; flag problems rather than silently moving dates. Mark any assumption as [ASSUMED]. Return: 1. A roadmap table: period | workstream | milestone | depends on | integration point? 2. A dependency list with status: OK / tight / conflict. 3. The top 5 program-level risks from the roadmap. 4. A one-page summary view for executives: phases, major milestones, and decision points. 5. A description of how to draw it as a swimlane chart.