Clinical supply planning software vs. IRT/RTSM
Sponsors evaluating clinical supply software often put planning tools and IRT/RTSM systems in the same bucket. They are different categories that answer different questions: planning software decides how much drug to make and where to position it; an IRT executes randomization and site resupply once the drug exists. Most trials of any size need both.
What supply planning software is
Clinical supply planning software (TrialSupply is in this category, alongside forecasting tools such as N-SIDE) supports the forward-looking process: projecting patient enrollment, converting it into drug demand by depot and by month, and planning production, packaging, and deployment against that demand — typically on a monthly CD&OP cadence.
What IRT/RTSM is
IRT (Interactive Response Technology), also called RTSM (Randomization and Trial Supply Management), is the transactional system used during trial conduct: it randomizes patients to treatment arms, assigns kits at sites, and triggers depot-to-site resupply shipments when site inventory runs low. Vendors in this category include Suvoda, 4G Clinical, Signant Health, and Endpoint Clinical.
Where planning software wins
- Deciding how much drug to manufacture and package, and when — before the trial and at every re-forecast.
- Modeling how demand changes when enrollment assumptions, dosing, or timelines change.
- Depot allocation: positioning supply by region ahead of demand rather than reacting to site-level triggers.
- Portfolio-level planning across multiple trials sharing the same drug supply.
- Measuring forecast accuracy cycle over cycle.
Where IRT/RTSM wins
- Randomization and blinding — this is regulated core IRT territory, and planning tools do not do it.
- Real-time site inventory tracking and automated resupply triggers during trial conduct.
- Kit-level accountability: which kit went to which patient at which site.
- Integration with EDC and the operational systems of record for trial conduct.
Side-by-side
| Dimension | Supply planning software | IRT / RTSM |
|---|---|---|
| Core question answered | How much drug do we need, where, and when? | Which kit goes to which patient, and when does a site get resupplied? |
| Time horizon | Forward-looking (months to years) | Real-time, during trial conduct |
| Randomization & blinding | No | Yes — core function |
| Demand forecasting | Yes — core function | No (executes against configured rules) |
| Production & packaging planning | Yes | No |
| Site-level resupply execution | No | Yes — core function |
| Typical primary user | Clinical supply planners | Sites, CTMs, and supply execution teams |
| Replaces the other? | No — complements IRT | No — complements planning |
The bottom line
This is not an either/or decision. An IRT is effectively mandatory for a randomized multi-site trial; planning software addresses the forecasting and supply planning work that otherwise lives in spreadsheets. TrialSupply sits firmly in the planning category and is designed to work alongside your IRT, not replace it.
FAQ
Can an IRT's resupply algorithms replace supply planning?
IRT resupply manages distribution of inventory that already exists, using rules configured at study setup. It does not tell you how much drug to manufacture, when to schedule packaging runs, or how demand will shift as enrollment assumptions change — that is planning work, done before and throughout the trial.
Does TrialSupply integrate with IRT systems?
TrialSupply is designed to work alongside your IRT and can incorporate actuals such as enrollment counts into the planning process. For specifics on integrating with a particular IRT vendor, contact us at hello@trialsupply.co.
Do small trials need both?
A small, single-region, open-label study may get by with an IRT (or even manual assignment) plus a spreadsheet plan. As trial count, regions, and blinding complexity grow, the planning workload grows past what spreadsheets handle well — that is the point where dedicated planning software earns its place.