# Recurring quality controls
**URL:** https://discuss.tryton.org/t/recurring-quality-controls/6384
**Category:** Ideas
**Tags:** quality
**Created:** [July 27, 2023, 8:18am UTC](https://discuss.tryton.org/t/recurring-quality-controls/6384 "2023-07-27T08:18:16Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@acaubet](https://discuss.tryton.org/u/acaubet)
#### Post date: [July 27, 2023, 8:18am UTC](https://discuss.tryton.org/t/recurring-quality-controls/6384/1 "2023-07-27T08:18:17Z")
Hi, we identified a need that we think may improve features of quality module.
Some products degrade/change over time (p.ex. Water can change PH due to multiple factors), so it needs to be checked regularly to ensure that they stay controlled (other chemical products can be dangerous if they are not stable) and if it’s not in the required parameters actions can be done (to change the PH).
So I think we can add in the control some timedelta or fields like we do in `ir.cron` to define how often each control need to be checked if there’s stock of it.
Thoughts? Has any identified any similar needs?
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### Author:  [@ced](https://discuss.tryton.org/u/ced)
#### Post date: [July 27, 2023, 10:36am UTC](https://discuss.tryton.org/t/recurring-quality-controls/6384/2 "2023-07-27T10:36:07Z")
I do not think the quality module can be used for this purpose because it is based on operations but there is no operations for a product being stored.
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### Author:  [@edbo](https://discuss.tryton.org/u/edbo)
#### Post date: [July 27, 2023, 11:44am UTC](https://discuss.tryton.org/t/recurring-quality-controls/6384/3 "2023-07-27T11:44:55Z")
I think you are talking more about testing / calibration which also applies to several types of equipment, mostly the measurement equipment. This differs from the quality control module which is used to check the quality of the products when received or before being used.
You can take a look at Kalenis LIMS where such thing is implemented.