According to the PMBOK Guide, the project manager should design the communication management plan based on the project's needs, stakeholder's expectations, and the project life cycle. In a hybrid environment, where some aspects of the project are agile and some are predictive, the project manager should use a combination of formal and informal, synchronous and asynchronous, and written and verbal communication methods. Weekly colocated meetings with the relevant stakeholders can provide the most effective and efficient way of communicating the project's progress, issues, risks, and changes. It can also facilitate collaboration, feedback, and alignment among the stakeholders. Biweekly conference calls, weekly one-on-one meetings, and biweekly written status reports may not be sufficient or timely enough to ensure the project will be on schedule. References: PMBOK Guide, 6th edition, page 377-378, section 10.1.3.1 Communication Management Plan.