Definition
GSP (Good Supply Practice, the quality management practice for drug distribution) is the national quality-management practice China applies to drug distribution. It covers procurement, storage, transport, and sale. Temperature records, equipment calibration, and validation reports in pharmaceutical cold-chain logistics must meet GSP. Together with HACCP for food safety and the FDA for U.S. drug regulation, GSP is part of the compliance framework for pharmaceuticals and food.
Core requirements of GSP
GSP requires a quality-management system. That includes validation and calibration of facilities and equipment—cold stores, refrigerated vehicles, and temperature and humidity monitors—and standard procedures for procurement, receiving, storage, in-storage care, outbound release, and transport. It also requires temperature recording and traceability over the whole cold chain, control of nonconforming product and recalls, and training and assessment of staff. IoT temperature and humidity sensors and temperature sensors can collect and store the temperature data and meet the GSP record requirement.
Application of IoT in GSP Compliance
IoT gives GSP compliance automation and traceability. Temperature and humidity sensors and temperature sensors read cold stores, refrigerated vehicles, and insulated boxes in real time, and send the data to a cloud platform over 4G or WiFi. An excursion raises an alarm, and the history can be exported for audit. A blockchain can make the record harder to alter. SimtoLink can network the sensors, collect the data, and integrate it by API for a pharmaceutical cold chain, so the operation can meet GSP.
Implementation Guidance
To meet GSP, an enterprise installs compliant temperature and humidity sensors, temperature sensors, and other sensors; qualifies its cold stores and refrigerated vehicles; standardizes cold-chain transport and reverse logistics; and connects the data to a cloud platform. Selection should cover sensor accuracy and the calibration interval, storage and export of the data, integration with the WMS and ERP already in use, and further international requirements such as the FDA.
The temperature evidence chain in distribution
GSP constrains quality responsibility in drug distribution: from whom the drug was bought, how it was received, at what temperature and humidity it was stored, when it left the warehouse, who transported it, to whom it was sold, and how nonconforming product was isolated. It is not the name of a particular thermometer. What a cold-chain drug needs is temperature evidence that is continuous and can be tied to a batch number, plus equipment that has been qualified, probes calibrated on schedule, and a disposition and review after a limit is crossed. An inspection has to be able to call the record up by batch number, not leave a curve in the cold store with no owner and no batch.
When an enterprise stores and transports in that scope, facilities, staff responsibilities, and documents have to be in place already. Loading, door openings, and extreme conditions for cold stores, refrigerated vehicles, and insulated boxes should stay inside a range that has already been qualified. A loading method outside that range cannot reuse the old conclusion. Probe positions should be the representative points chosen at qualification. After racks or the loading method change, qualify again. Time, permissions, and the trace of edits in the system have to be kept. Overwriting an original reading afterward does not meet the record requirement.
A temperature curve that looks complete, and cannot be matched to a batch number and the person at handover, is a common problem. Several products in one cold store, with one room temperature used to prove every batch was compliant, is another. Continuing to use a probe after calibration has expired means the bias is unknown. A recorder turned off in transit, or run out of power, then filled in on arrival as "there should have been no problem," is the same. A night alarm clicked away the next day in the system, with no assessment of whether the drug can still be sold, is another. Receipt that checks only name and quantity still lets goods whose temperature has already drifted into the qualified area.
Automatic collection also cannot replace checking that the probe is still alive. A failed probe may keep uploading the same number, and the curve looks very flat. Ambient temperature outside an insulated box taken as the drug temperature leaves the ice pack already spent while the outside of the box is still cool. A return put back into a qualified bin, without being separated as pending inspection or nonconforming, is the same gap. Pull a batch number at random and join receipt, in-store temperature, outbound, and transport into one timeline. Look at gaps and at what was done after a limit was crossed. The carrier segment of cold chain logistics, and the calibration date of the temperature sensor, both have to fall on that timeline.
Also keep the time difference between the two sides of a handover in the record. If the vehicle recorder and the warehouse platform differ by several minutes, the moment a limit was crossed is assigned to the wrong party's segment. The time-sync record and the handover signature should be readable together, not exported as two curves that cannot be aligned.
The disposition after a limit is crossed must state whether the drug stays on sale, is isolated, or is scrapped, and who decided. A record that has only the alarm time, and no disposition, cannot show that this batch still meets the conditions for release.