Which of the following is the BEST way for a CIO to provide progress updates...

An IT summary dashboard is the best way for a CIO to provide progress updates on a newly implemented IT strategic plan to the board of directors, because it can help to communicate the key performance indicators (KPIs), benefits, risks, and issues of the IT strategic plan in a concise, visual, and interactive way. An IT summary dashboard can also help to align the IT strategic plan with the business strategy, value creation, and stakeholder expectations, and demonstrate the value and contribution of IT to the enterprise. Presenting IT critical success factors (CSFs), reporting results of key risk indicators (KRIs), and reporting results of stage-gate reviews are not as effective as presenting an IT summary dashboard, because they are more focused on specific aspects of the IT strategic plan, rather than providing a holistic and comprehensive overview. References:

IT Governance Dashboard, ISACA

What is an IT Dashboard?, Smartsheet

IT Strategy Dashboard, ClearPoint Strategy