In this guide 6 sections
ALCOA stands for attributable, legible, contemporaneous, original and accurate. It describes a trustworthy record. On a batch sheet it means the right person wrote the right value at the right moment, in a form that stays readable. Software helps by stamping user and time automatically.
Attributable: who did this?
Every entry needs a name behind it. On a batch sheet, that is the operator’s initials beside the charged quantity and the checker’s initials beside the second verification.
In the lab, it is the analyst’s identity on the HPLC injection sequence and on the printed chromatogram. A result with no author is an orphan.
Shared logins destroy this attribute quickly. When three analysts use one account on the instrument PC, no entry can be traced to a person. Software cures it only when each person has a login that nobody else uses.
Legible and original: can it be read, and is it the first capture?
Legible is more than handwriting. A faded thermal printout of a balance reading becomes unreadable within months. A column of overwritten numbers is also illegible, even if each digit is clear.
Original means the first recording, or a certified copy of it. The weight written on a scrap of paper and copied neatly to the batch sheet later makes the scrap the original. The scrap is then a record, and it must be kept.
Raw data in the lab is the same. The chromatogram file in the instrument software is the original, not the PDF printed from it.
- Thermal paper copied before it fades
- Rough notes retained, never thrown away
- Instrument raw files kept with the printout
- Overwritten values struck once, not scribbled
Contemporaneous: recorded when it happened
The entry belongs to the moment of the action. A tablet press operator who fills the compression log for the whole shift at the end of it has broken the rule, even if every figure is correct.
Time stamps expose the habit. Ten rows entered within one minute for readings supposedly taken across eight hours will draw a reviewer’s eye. On paper, nothing shows it.
Software helps by writing the server time to each entry and by refusing to let a user pick the time. It cannot make anyone record on the spot, but it makes delay visible.
Accurate: does the value match what happened?
Accuracy covers errors and corrections. A pH of 6.8 written as 8.6 is a slip. A correction made with a stated reason keeps the record accurate, while a hidden correction does not.
It also covers calculations. If an analyst computes assay by hand from peak areas, a wrong factor goes unseen. If the system calculates from the stored area, the formula is fixed and checked once.
Range checks add a second guard. A moisture figure far outside the specification can be flagged at entry, before it travels onwards.
- Corrections carry a reason, date and initials
- Calculations come from fixed, validated formulas
- Entries outside limits are flagged at once
- Units are fixed by the field, never typed
Where the extended attributes fit, and a first step
You will often see ALCOA written with extra letters: complete, consistent, enduring and available. They ask for the full set of results including repeats. They ask for dates and times in a consistent order. Records must survive the retention period and be retrievable for inspection.
A complete lab record includes the failed injection and the retest, not only the passing one. Hiding a repeat breaks the attribute whatever the software does.
Start small. Take one finished batch record and one analyst’s file, read each attribute against them with a highlighter, and mark every spot where the answer is only habit.
ALCOA walk-through sheet
Five rows on a single page, one per ALCOA attribute. Columns hold a batch sheet example, a lab result example, what software can enforce and what stays a human habit. A bottom strip lists the extended attributes, with a tick for each record reviewed.
Open a blank worksheet to printQuestions owners ask
What does ALCOA stand for?
Attributable, legible, contemporaneous, original and accurate. The extended list adds complete, consistent, enduring and available.
Does software make a record ALCOA compliant?
Not alone. It enforces user identity, time stamps and range checks. People still decide whether to record on the spot and whether to report every repeat.
Do ALCOA principles apply to paper records?
Yes. They were written with paper in mind, and each attribute can be checked on a handwritten sheet. Paper simply gives fewer automatic safeguards.
Which attribute do plants miss most?
Contemporaneous recording is frequently missed, since entries filled at the end of a shift look tidy. Time stamps and spot checks by supervisors expose it.