I need to design a business intelligence dashboard for [USER_ROLE: e.g., executives, marketing team, sales managers, etc.] to monitor and analyze [BUSINESS_AREA: e.g., sales performance, marketing campaigns, operational efficiency, etc.]. Dashboard context: Primary dashboard users: [USERS] Key decisions to support: [DECISIONS] Available data sources: [DATA_SOURCES] Update frequency needs: [UPDATE_FREQUENCY] Technical platform: [PLATFORM if known] Device usage: [DEVICES] Please create a comprehensive dashboard design plan including: Dashboard strategy and requirements: User needs assessment Decision support mapping Information hierarchy development Primary dashboard objective Data storytelling approach Cognitive load management Actionability focus Metric selection and organization: Core KPI recommendations Supporting metric framework Metric categorization approach Leading vs. lagging indicator balance Comparative context incorporation Target and threshold integration Drill-down capability planning Visualization selection and design: Chart type recommendations by metric Visual hierarchy establishment Color scheme strategy Typography and labeling approach Legend and explanation integration Annotation strategy Accessibility considerations Layout and user experience: Dashboard layout recommendation Information grouping and flow Navigation and interaction design Filtering and segmentation controls Mobile vs. desktop optimization Progressive disclosure approach Attention direction techniques Technical implementation guidance: Data integration considerations Calculation and transformation requirements Refresh rate and caching strategy Performance optimization approaches Export and sharing capabilities Alert and notification design Security and access control Evaluation and iteration framework: Dashboard effectiveness metrics User feedback collection methodology Usage pattern analysis Iteration and improvement process Advanced feature roadmap Performance benchmark establishment Maintenance and updating protocol Please provide this as a comprehensive dashboard design specification I can use to create an effective business intelligence tool that drives better decision-making.