Lay out your visits across the top and your assessments down the side, toggle what happens at each visit, and export the grid as CSV for your protocol, budget or EDC build. A planning aid that runs in your browser.
Free sandbox · No credit card · 21 CFR Part 11 aligned
| Assessment | Screening | Day 1 | Week 2 | Week 4 | Week 12 | Follow-up |
|---|---|---|---|---|---|---|
| Informed consent | ||||||
| Eligibility check | ||||||
| Vital signs | ||||||
| ECG | ||||||
| Laboratory tests | ||||||
| Adverse events | ||||||
| Symptom diary | D | D | D | D |
x = done at visit, D = daily diary
Free tool
Add visits and assessments, toggle each cell, and export the grid as CSV. Everything runs in your browser; nothing is saved or sent. It is a planning aid, not validated software.
| Assessment | Screening | Baseline | Week 4 | Week 12 | Follow-up |
|---|---|---|---|---|---|
| Informed consent | |||||
| Eligibility check | |||||
| Vital signs | |||||
| Laboratory | |||||
| ECG | |||||
| Adverse events | |||||
| Questionnaire (ePRO) | |||||
| Assessments per visit | 5 | 5 | 3 | 5 | 3 |
Example grid with demo visits. A schedule like this becomes the visit and form structure of your study.
Why the schedule of assessments matters
The method
A schedule of assessments (also called a schedule of events or schedule of activities) is a grid in the protocol. Visits or time points run across the top, from screening through treatment to follow-up. Assessments run down the side: consent, eligibility, demographics, medical history, physical examination, vital signs, ECG, laboratory tests, questionnaires, drug administration, concomitant medication review, adverse event assessment and so on. A mark in a cell means the assessment is done at that visit.
The grid looks simple but it carries a lot of weight. It is the checklist a coordinator uses to run a visit; the basis for the site payment per visit in the budget; the source from which data managers decide which forms exist and when they are due; and the reference a monitor uses to spot missing assessments. Protocol guidance such as the SPIRIT checklist for trial protocols asks for a schedule of enrolment, interventions and assessments, often shown as a figure or table.
To build a useful one, decide the visit structure first. List each visit with its nominal timing (Day 1, Week 4) and a window (plus or minus a number of days) so sites know how much flexibility they have. Then list assessments in the order they happen at a visit, group related items, and mark each cell. Add footnotes for anything conditional: "only if the screening result is abnormal", "pre-dose and 2 hours post-dose", "women of childbearing potential only". Finally, count: how many procedures does one visit contain, and how long will it take the participant? Burden is a major driver of dropout, which the dropout-adjusted sample size calculator turns into a larger enrolment target.
A schedule rarely survives contact with real participants unchanged. Define the allowed window around each visit, say what to do when a visit is missed or outside the window, and describe an early termination visit and an unscheduled visit. Write which assessments apply at those visits too. If you do not, each site will decide for itself and the data will be inconsistent. Protocol deviation tracking is where out-of-window visits are recorded afterwards.
Some assessments are not tied to a single visit: a daily diary between visits, or a questionnaire every week at home. Mark them clearly (the example uses D for diary) and state the schedule in a footnote. In an EDC these become ePRO tasks rather than visit forms, with reminders and completion windows.
Reference
| Assessment | Typical timing | Why it is in the schedule |
|---|---|---|
| Informed consent | Before any study procedure | Nothing study-specific happens before it |
| Eligibility check | Screening and baseline | Confirms inclusion and exclusion criteria |
| Vital signs and ECG | Screening, dosing visits | Safety and baseline values |
| Laboratory tests | Screening, selected visits | Safety, eligibility, endpoints |
| Adverse event review | Every visit after first dose | Continuous safety capture |
| Concomitant medication review | Every visit | Interactions and protocol restrictions |
| Questionnaires or diaries | As the endpoint requires | Patient-reported outcomes |
A generic pattern, not a template for any specific study. Your protocol defines what applies.
From grid to study build
Once the grid is stable, it becomes the brief for the study build. Each column becomes a visit in the electronic data capture system; each row becomes a form, or a section in a form, that appears at the visits where it is marked. The vital signs row maps to a vital signs eCRF, the adverse event row to an adverse event form, the laboratory row to a laboratory results template, and so on. A grid that is clear about timing and conditionality makes that mapping quick, and an ambiguous one produces rework.
Capture can do the first draft for you. Its AI study builder reads a protocol (PDF or Word) and drafts the visit schedule and forms; nothing is saved without human review, so the grid you export from this tool is a good way to check what the AI drafted against what you intended. Read about it in protocol to study setup and clinical trial study builder software, and see the CRF builder for the forms themselves. When a study is ready, Capture can export a blank eCRF PDF with a visit-by-form matrix, which is a useful cross-check against the protocol SoA for ethics or IRB submission.
The same grid feeds the budget. Every cross is a procedure someone has to perform and be paid for, so multiply by the number of participants to see the per-visit cost. The clinical trial budget template and the cost-per-patient calculator take it from there, and the timeline calculator shows how follow-up length drives duration.
Visit burden
Once the grid is filled in, count the marks per column. A Day 1 visit with eleven procedures, including blood draws and an ECG, may take half a day; if the same participant is also asked to attend three more such visits in a month, expect missed visits. Look for assessments that appear at every visit without a clear reason, and for visits where several burdensome procedures stack up. Moving a questionnaire to a home diary or dropping a low-value measurement is a cheap protocol change at this stage and an expensive amendment later.
Upload your protocol or build the visits yourself in the free sandbox, test the forms and enter sample data. No credit card. You pay only when you go live.
Assumptions and limits
The builder is a simple grid with toggles and CSV export. It does not store your schedule, check that your visit timings are consistent, calculate windows, or model conditional logic such as "only if". It does not produce the formatted table that goes into a protocol document, and it does not know your study, so it cannot tell you which assessments you should include. Footnotes and visit windows are yours to add in the protocol text or in the exported file.
A schedule of assessments is a clinical and scientific document. The assessments, their timing and their relation to endpoints and safety must be decided by the investigators and sponsor, reviewed by the medical monitor and statistician, and approved by the ethics committee or IRB as part of the protocol. If you change the schedule through an amendment, the data capture build must change too; see protocol amendments without change orders. This tool is a demonstration and planning aid, not validated software.
Before you finalise
Every visit has a nominal day and an allowed window.
Assessments listed in the order they happen, with timing for pre- and post-dose.
Conditional or sub-group assessments explained.
Defined, with the assessments that apply.
Sections on procedures and endpoints agree with the grid.
Time and procedures per visit checked for participant burden.
A table in the protocol listing the visits across the top and the assessments down the side, with marks showing what is done at each visit. It is also called a schedule of events or schedule of activities.
Yes. The builder exports the grid as CSV, which you can open in a spreadsheet, paste into a protocol or use as a brief for your EDC build.
No. It runs in your browser and nothing is stored or sent. Export the CSV to keep your work.
Yes. Capture's AI study builder reads a protocol (PDF, DOCX or DOC) and drafts the visit schedule and forms. Nothing is saved without human review.
Not directly. The grid shows what happens at each visit. Add windows and footnotes in the exported file or the protocol text.
No. It is a free planning aid. The final schedule must be reviewed by the investigators, sponsor and ethics committee as part of the protocol.
Keep exploring
Protocol to study setup
Draft visits and forms from a protocol.
Clinical trial study builder software
The AI study builder.
Clinical trial protocol template
Where the SoA lives.
Clinical trial budget template
Price each visit.
Clinical trial timeline calculator
Follow-up length and duration.
CRF builder for clinical trials
Forms for each row.
Free sandbox with every feature. No credit card. You pay only when you go live.