The biggest mistake in clinical research often happens before the first patient is recruited

Clinical trial performance is often evaluated through recruitment metrics, retention rates, protocol adherence and timeline delivery. Yet the factors that determine these outcomes are frequently established long before a study opens. 

Protocol design remains one of the most influential, and sometimes underestimated, drivers of trial success.

Scientific rigour will always be the foundation of clinical research. However, even the strongest scientific design can encounter significant operational challenges if real-world feasibility is not considered closely enough in development. Recruitment delays, participant attrition, protocol deviations and site burden are commonly viewed as delivery challenges. In many cases, they are protocol design challenges manifested during execution.

"The most significant risks to study delivery are often embedded in the protocol before the first site is activated."

The cost of operational disconnect

 As trial designs become increasingly complex, the gap between protocol requirements and practical delivery can widen.

Eligibility criteria, visit schedules, assessment frequency and study procedures are often developed with clear scientific justification. The cumulative impact of these decisions on recruitment, retention and site performance is not always fully understood until the study is underway.

At that point, the consequences become measurable.

Recruitment projections become difficult to achieve. Site workloads increase. Participant engagement declines. Protocol amendments introduce additional cost and delay.

These outcomes are rarely the result of a single design decision. They emerge from the accumulation of operational friction across the participant and site experience.

Protocol optimisation as a strategic discipline

The industry has traditionally separated protocol design from trial delivery. Increasingly, this distinction is becoming difficult to sustain.

Successful studies require more than scientific excellence. They require protocols that can be executed efficiently, consistently and at scale. This is where operational expertise creates value.

Early assessment of protocol feasibility allows organisations to identify barriers before they become risks. Recruitment assumptions can be validated against real-world populations. Site requirements can be assessed against delivery realities. Participant expectations can be considered alongside scientific objectives. 

The result is a stronger protocol that is better positioned to achieve its objectives whilst maintaining the scientific value.

"Protocol optimisation is about ensuring that every aspect is purposeful and effective."

Why earlier collaboration matters

Sponsors and CROs face increasing pressure to accelerate timelines while maintaining data quality, regulatory compliance and participant engagement. Achieving these objectives requires broader perspectives during study planning.

Clinical leadership, investigator insight and operational expertise each provide a different lens through which protocol feasibility can be assessed. When these perspectives are incorporated early, studies are better equipped to avoid preventable delivery challenges and achieve more predictable outcomes.

This is particularly important as the industry seeks to improve representation within clinical research and generate evidence that reflects real-world populations. A protocol that is scientifically robust but operationally restrictive will inevitably limit access to participation.

Moving beyond delivery

For more than 25 years, EMS Healthcare has worked at the intersection of clinical research, healthcare delivery and community engagement.

This experience provides a perspective that extends beyond study execution. It offers direct insight into how protocol decisions influence recruitment, retention, participant experience and operational performance in practice.

Combined with the expertise of our Principal Investigators and Medical Advisory Committee, this creates an opportunity to contribute earlier and more strategically to study development. The future of clinical research will not be defined solely on effective execution, but instead on design which can accelerate the development programme.

"The most successful studies are not simply delivered well. They are designed to be deliverable."

Join the conversation

As trial complexity continues to increase, protocol optimisation will become an increasingly important determinant of study success.

The organisations that integrate scientific, clinical and operational expertise at the earliest stages of development will be best positioned to improve recruitment performance, strengthen retention and generate more representative evidence.

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