Clinical development teams are under increasing pressure from multiple directions, and it’s starting to change how their work gets done. While outsourcing was once a niche strategy, that’s no longer the case. According to some estimates, contract research organizations (CROs) now manage over 70% of clinical trial activities in some therapeutic areas. Sponsors are relying less on internal teams and turning to external partners to get studies across the finish line.

At the same time, execution challenges haven’t eased. Consider that a recent Forbes article found that more than 80% of clinical trials experience delays or fail to meet initial timelines, often due to site performance issues, enrollment challenges, or resource constraints. 

These two trends are closely connected. Trials are becoming more complex, global, and data-intensive, while internal teams are being asked to do more with tighter budgets and leaner staffing models. Add in growing expectations around data quality, regulatory compliance, and the responsible use of AI, and the margin for error continues to shrink.

As a result, many sponsors are outsourcing more while also rethinking how those partnerships are structured.

Why traditional FSP models are being re-evaluated

Functional Service Provider (FSP) models have been a reliable way to extend internal teams for years. They offer structure, continuity, and dedicated support across key functions, but in today’s environment, those same strengths can become limitations.

Traditional FSP models are often built around fixed capacity. Teams are staffed based on projected needs, even though those needs rarely stay consistent over the life of a study. A Phase II trial may require a certain level of support, only to shift dramatically as it expands into Phase III, adds new sites, or introduces more complex endpoints.

That mismatch creates inefficiencies. Sponsors may find themselves:

• Carrying excess capacity during slower periods
• Scrambling to add resources when timelines accelerate
• Locked into budgets that don’t reflect real-time study demands

Talent availability adds another layer of complexity. The clinical workforce remains tight, particularly for specialized roles in biometrics, safety, and data management. According to Deloitte, life sciences companies continue to face persistent talent shortages, especially in areas that require both technical expertise and regulatory experience.

New technologies are also reshaping how data is collected, analyzed, and submitted. Tools like AI can help improve efficiency, but they also introduce new validation requirements and operational considerations that demand experienced oversight.

Taken together, these factors are pushing sponsors to look for more adaptable ways to access expertise without committing to rigid staffing models.

What fractional sourcing looks like 

Unlike many FSP providers, Harbor Clinical allows for “fractional sourcing,” defined as the use of part-time team members who can be rapidly redeployed across functions and studies. These professionals are drawn from a global database of known, vetted, and trusted experts in a wide range of clinical research disciplines.

This model builds on the foundation of traditional FSP support but introduces a level of flexibility that aligns more closely with how clinical programs actually evolve.

Instead of assigning full-time resources to roles that may not require consistent coverage, fractional sourcing allows sponsors to:

• Bring in specialized expertise when and where it’s needed
• Adjust support levels as study demands change
• Redeploy experienced professionals across multiple programs without disruption

This distinction matters. In a traditional model, scaling often requires new hiring cycles, onboarding, and training. But with a fractional approach, those steps are minimized because the expertise is already in place and ready to engage.

This is particularly valuable in an environment where timelines often change, and budgets are under constant review. Sponsors can maintain high-quality execution without taking on unnecessary fixed costs.

Where fractional sourcing delivers the most impact

The benefits of fractional sourcing become even easier to see when you look at how it applies to specific functional areas. While the model can support a wide range of roles, its value is especially clear in functions that require specialized expertise and consistent regulatory alignment.

Clinical Operations

Clinical operations teams are responsible for keeping studies on track, from site selection and activation to ongoing monitoring and closeout. When resources are stretched too thin, delays quickly add up.

Consider a sponsor moving from Phase II to Phase III. The number of sites increases, geographic reach expands, and operational complexity grows. A traditional staffing model may require hiring additional full-time CRAs or study managers, even if the increased workload is temporary.

With fractional sourcing, sponsors can scale clinical operations support more effectively. Experienced professionals can step in to manage site activation, oversee monitoring activities, or address specific bottlenecks, then transition off as those needs stabilize. This approach makes it easier to maintain momentum without overcommitting resources.

Biometrics

Biometrics, which includes data management and biostatistics, plays a vital role in ensuring data integrity and supporting regulatory submissions, and errors or delays in this area can have serious downstream consequences.

According to research from Oracle, data-related issues are a contributing factor in a significant percentage of regulatory delays.

Workloads in biometrics also tend to fluctuate across the study lifecycle. Database builds, interim analyses, and final reporting phases require intense effort, followed by periods of lower activity.

Fractional sourcing allows sponsors to align expertise with these peaks and valleys. For example, a data management specialist can be brought in to support a database lock, while a biostatistician can assist with interim analysis planning, without the need for long-term staffing commitments.

Safety and Pharmacovigilance

Safety monitoring is one of the most critical aspects of any clinical trial. It requires continuous oversight, timely reporting, and a deep understanding of evolving regulatory expectations.

In rare disease studies or complex therapeutic areas, the need for experienced safety professionals becomes even more pronounced. These studies often involve smaller patient populations, unique endpoints, and heightened regulatory scrutiny.

Fractional sourcing provides access to senior-level pharmacovigilance experts who can support case processing, signal detection, and safety reporting on an as-needed basis. This ensures that safety activities remain consistent and compliant, even when internal teams are stretched. It also reduces the risk of oversight gaps, which can lead to compliance issues or delays.

Data Management

Accurate, well-organized data is the backbone of any successful clinical program, and data management teams play a key role in maintaining study quality, from case report form design through data cleaning and reconciliation.

However, data management demands often fluctuate throughout the study lifecycle. Early phases may require extensive setup, while later stages focus on cleaning and preparing data for submission.

A fractional model allows sponsors to bring in experienced data managers at each stage, ensuring continuity without maintaining a full-time team throughout the entire process. This becomes especially important when working across multiple studies with different timelines and requirements.

Supporting functions

Other functions, including clinical programming, medical writing, and biostatistics, can also benefit from fractional support, particularly when specialized expertise is needed for deliverables.

For example:

• A medical writer can assist with a clinical study report or regulatory submission
• A programmer can support dataset preparation for a specific milestone
• A biostatistician can provide input on study design or analysis plans

In each case, the goal is the same: Access the right expertise at the right time, without adding unnecessary overhead.

How fractional sourcing changes operational planning

Adopting a fractional approach goes beyond staffing and shapes how sponsors plan and execute their clinical programs. 

Budgets become more flexible because resources can be adjusted in real time, and instead of committing to fixed costs, sponsors can align spending with actual study activity.

Scalability improves as well. Teams can expand or contract based on trial phase, enrollment progress, or unexpected challenges, without the delays associated with traditional hiring.

There’s also a meaningful impact on continuity. Because fractional resources are often drawn from a consistent pool of experienced professionals, sponsors can maintain institutional knowledge across programs, even as specific roles evolve.

Finally, the model reduces the administrative burden associated with recruiting, onboarding, and training new staff. This allows internal teams to focus on strategic priorities rather than operational logistics.

Moving forward with a more adaptable model

Clinical development is becoming increasingly difficult to manage. Studies are more operationally demanding, regulatory expectations are constantly changing, and in many cases, budgets are getting crunched.

In this environment, rigid resourcing models can create more challenges than they solve. Sponsors need the ability to adapt quickly, access specialized expertise, and maintain high standards without losing control of costs.

Fractional sourcing offers an effective way to meet those needs. It provides flexibility without sacrificing quality, and it aligns more closely with the realities of modern clinical research.

For organizations exploring new approaches to FSP support, Harbor Clinical offers a model built around experienced professionals, flexible engagement, and a deep understanding of clinical operations. To learn more about how we can assist your next clinical study, email [email protected] or request more information here.