Ready by Design: Endpoints, Feasibility, and Scenario Testing

Hitting a primary endpoint on paper is only half the story. When trying to get positive attention from investors, research teams inspire confidence when the plan holds up in the real world. Investors evaluate early clinical plans for confidence, clarity, and clinical realism. Timelines need to reflect how sites operate, how patients live, and how enrollment ebbs and flows. This is where feasibility and scenario modeling, along with strong biostatistical insights, turn a good design into an executable one, and one that investors want to buy into. Chief Medical Officers (CMOs) can set the tone by pairing clinical priorities with the modeling work that proves the plan can be successful. 

Focus the design on feasibility and credibility 

The early stages of trials are challenging. Start-up may take longer at some sites, screen failures might cluster for unforeseen reasons, and competing studies can thin the pool of potential participants in key geographies and demographics. You cannot wish these issues away, but you can plan for them.  

Before finalizing the protocol, it helps to align on the core decisions. Begin by grounding the design in how care actually runs. Focus the design on a few essentials. Be clear about what you will measure. Set realistic expectations. Think ahead about potential real-world challenges.  

Being practical is part of using resources wisely. Choose the right mix of sites that spreads the work and avoids overloading the same centers. Map what you ask of participants (e.g., visits, tests, devices, etc.), because heavier demands can result in dropouts, slowing down your trial and undermining data quality.  

Use simulation to turn assumptions into decisions 

Simulation and scenario tests let teams try out different versions of the plan before anyone enrolls. That includes testing different ways to measure benefit. You can model a subjective measure (e.g. pain ratings or diary entries) and compare it to a more objective readout (e.g. blood pressure readings or biomarker test results). Typically, when a measure is more objective, the readings are less variable, allowing for studies to move more quickly, with fewer patients. 

The Playbook shows this in practice. In one program, moving to a more objective measure cut the number of participants needed by about 80 percent. In an infant RSV study, switching to a noninvasive nasal strip made data collection easier for families and sites, which lowered burden and helped the trial finish faster with better retention. 

Turn scenario planning into practical design choices 

This kind of scenario testing can surface the practical choices that need to be made in order to move on. For example, it can produce data that helps to optimize the site mix, or adjust the study design in ways to minimize patient burden.  

With this in mind, following is a checklist you can use to confirm the plan is ready to run. 

Design Readiness Checklist 

• Pick data points to measure that reflect what patients and doctors care about, and make sure every site can collect them the same way.
• Set realistic targets for patient improvement. 
• Stress-test the timeline with simple scenarios: e.g., faster and slower enrollment, screen failures, other studies competing for the same patients, and everyday delays.
• Consider patient burden early to ensure that demands on time and energy are reasonable in order to minimize dropouts. 
• Be clear about what the treatment will be and explain why it’s important in terms of both patient care and trial objectives.
• Set clear checkpoints in advance to decide whether to keep going, adjust, or stop. 

Make the next step simple 

When you plan feasibility and timelines with the same care you give the stats, the plan is solid. In the meeting, the CMO explains what matters to patients and everyday practice, and the statistician shows the modeled path to results. Here, you can show what happens if assumptions shift and still point to a clear path to results that sites can run and patients can follow. That makes investor conversations easier and helps the team run the study more smoothly once it starts. 

For a deeper dive into scenario modeling and a full Design Readiness Checklist  download the Chief Medical Officer’s Investor Playbook. It expands on these steps with examples and practical tools you can put to work before first patient in.