The reason to keep maintenance records is not diligence, it is that somebody will ask a question later that only the record can answer: when was this last serviced, what was found, has this failed before. A log that cannot answer those is filing rather than record-keeping, and the difference comes down to a few fields nobody thinks about while designing the form.
What a maintenance log has to carry
Date, asset, what was done, what was found, and who did it. The fourth is the one most often missing and the one most often needed, because a reading or an observation is what makes the record useful beyond proving a visit happened. A maintenance log that records completion alone tells you the plan ran; one that records condition tells you whether the plan is right, which is the only route to better intervals.
The equipment maintenance log lives with the asset
Records organised by date answer almost nothing useful. Records organised by asset answer the questions people actually ask: what has this machine had done, how often, and has this fault appeared before. That argues for the asset as the primary key and the date as an attribute, which sounds obvious and is the opposite of how most paper systems and a surprising number of digital ones are arranged.
Reporting is a by-product, not a separate exercise
Maintenance reporting and maintenance reports should fall out of records that were captured properly, not be assembled from them at month end. If producing a report means somebody transcribing, the records are in the wrong shape or the wrong place. Decide which two or three questions the reports must answer before designing the capture, because retrofitting a report onto records that never captured the field is the most common and most avoidable rework in this whole area.
Operation and maintenance manuals, and where they belong
Operation and maintenance manuals arrive with equipment and are usually filed somewhere nobody looks. They matter for two things: the manufacturer's recommended intervals, which are a starting point rather than an answer, and the procedures for tasks people do rarely. Attaching the relevant manual to the asset record rather than to a shared drive is a small change that decides whether it is ever consulted again.
Questions people ask about maintenance log
What should a maintenance record include?
Date, asset, what was done, what was found, and who did it. The 'what was found' field is the one most often omitted and the one that makes the record useful for anything beyond proving a visit happened.
How long should maintenance records be kept?
Long enough to see repeat failures, which usually means years rather than months. Where a regulator or insurer sets a period for particular equipment, that requirement is theirs to state and yours to apply.
Why organise records by asset rather than by date?
Because the questions people ask are about assets: what has this had done, how often, has this fault happened before. Date-ordered records answer almost none of them without a search.