Four-door or six-door freezer: Calculating from high inventory point to actual cargo space

The choice between four-door and six-door freezers cannot be determined by a total number of liters. What really needs to be compared is: at a representative inventory high point, how many usable storage spaces are required for food with different storage requirements; whether these storage spaces can be placed, taken out and replenished as required in the candidate equipment. The number of doors only describes the number of entrances and cannot be used to determine that there are the same number of independent temperature zones inside.

Observing three business days first can help identify obvious conflicts, but it is not enough to ensure coverage of weekends, concentrated arrivals, holidays or menu changes. The procurement conclusion should clearly state the needs covered by the observations and the samples that are still missing, rather than letting short-term inventory charts replace all judgments.

View inventory, packaging and pickup actions simultaneously throughout the day

Before observing, list the material groups: refrigeration and freezing are counted separately. Raw materials, semi-finished products and directly usable foods are distinguished according to actual management requirements, and then common packaging is recorded. Cambro's storage articles emphasize the transition between preparation, cooking, and serving. [1] This article implements this issue into the storage location analysis, and does not directly use its temperature value or product effect as the basis for our store's storage.

For each sample day, you can choose four observation points after receiving the goods, before opening the meal, after opening the meal and before closing the store, and record inventory, packaging, location and access conflicts at the same time. This is called four-time point recording, not continuous hour-by-hour data. In addition, centralized replenishment, temporary large orders and abnormal transfers between the two observations are recorded as events to prevent the inventory high point from falling exactly outside the four time points.

If there is no concentrated arrival of goods on a certain day, do not refer to the maximum inventory on that day as the peak of the entire purchasing cycle. You can first mark "the arrival of the whole cycle has not yet been covered", and then supplement the supply arrangement or select the corresponding date for observation. The predicted future menu is listed separately with predicted scenarios and cannot be mixed with observed stocks to claim that they are all field records.

Counting objects should also be unified. When the same box of ingredients is moved from the back cabinet to the operating position, it is just a change in location, not an increase in inventory; after a box is broken into several boxes, the number of packages changes, which does not mean an increase in the total amount of food. Only by retaining the correspondence between packages can we explain whether the increase in cargo space is due to an increase in inventory or a change in packaging methods.

From total quantity to cargo location, first unify the meaning of containers

Assuming that a batch of commonly used packages have the same outer dimensions, but some contain raw ingredients and some contain ready-to-use food, they still may not necessarily be able to share a storage area. The calculation cannot be done by adding up all the volumes and then dividing by the number of liters in the freezer. It is necessary to group the containers first, and then check the outer dimensions, allowed placement directions, lid and label positions of each group of containers, and whether they need to be taken out as a whole when using.

Below is a comparison table to directly supplement sizes and quantities. It is not the result of loading any model, nor does it preset that all containers can be stacked.

Packaging or material group	What to measure and check	Conditions retained when converting to cargo space
Turnover box with lid	External length, width and height, handle and cover protruding part	Remove paths and allow stacking
Small packaging box	Single box appearance, classification identification and combination quantity	No need to block the identity of the back row in the front row
Bagged raw materials	Actual supporting container and maximum unfolded size	Do not take extrusion deformation as normal capacity
Temporary full box arrival	Handling requirements for outer cartons and inner packaging	Acceptance and storage in accordance with the approved method, and does not default to the whole box.
Opened spare materials	Containers, labels and corresponding storage requirements	Identify separately with unopened quantity

For trial assembly, clean simulators of equal size should be used. If necessary, appropriate weights should be simulated. First, confirm the position of the shelf and the taking action without affecting the safety of food and equipment. It’s not just “fitting” that’s measured, but also whether another type of food must be temporarily removed when the rear container is taken out, and whether the door can close properly.

The shelf load, air flow channel and allowable loading range need to be supported by the same model document. When these conditions are not met, the number of fully filled simulated objects cannot be declared as safe and available cargo space. The space fitting only answers questions about geometry and movement, and temperature maintenance and food adaptation still need to be confirmed separately.

Two limits often obscured by total liters

The first is the temperature zone distribution. Candidate equipment, even if it has a larger total volume, may not provide enough space for the types of food products in greatest demand. It is necessary to check the actual structure, control method and capacity of each temperature zone. The nominal volume, effective volume and the number of goods that can be used for a specific package are not the same concept. If the information is not clearly written, the manufacturer will not provide the answer.

The second is the conditions for taking. More cabinet doors may make certain operations more convenient, or they may conflict with carts or personnel positions during peak times. Observe which doors are used at the same time, why employees open them, and what they are looking for when they open the door. If the main time is spent on identifying labels, changing the size of the cabinet may not solve the problem; if the same set of ingredients is frequently used by different positions, the method of replenishing the ingredients should be studied, rather than just increasing the reserve stock.

The storage organization of food must also meet corresponding hygiene requirements. The interpretation of the specifications by the China Institute of Standardization involves storage separation and meeting special conditions such as temperature and humidity. [2] This means that whether a candidate meets a specific food need cannot be inferred solely from the device display range or number of gates. When comparing, you should confirm the same configuration capacity, temperature zone and size caliber one by one. Candidates with missing items in the data should be filled in before drawing a conclusion.

Congestion due to concentrated arrivals does not necessarily equal long-term capacity expansion

It is assumed that the back-up area can usually accommodate the required materials, except that a suitable location is temporarily unavailable when a whole batch arrives. First check whether the arrival arrangement, acceptance connection and packaging processing are reasonable, and then compare the impact of adding equipment and adjusting replenishment. If you change to more frequent delivery, you need to confirm whether the supplier can do it, the cost and how to arrange abnormal stocking. "Store less" cannot be regarded as an unconditional answer.

Another situation is that there are not enough compliant storage spaces before meals are opened every day. Even if the replenishment time is moved, it will only postpone the gap to the next node. At this time, there will be a clearer basis for capacity expansion, but it still needs to be clear which area and how many types of packaging spaces are being expanded. The total amount of the whole bank cannot be used to cover up the continuous shortage of a certain temperature zone.

Stressful scenarios such as replenishment delays should be prioritized for tabletop simulations: remove a replenishment on the schedule and check which planned volumes cannot be covered. When spatial movements are involved, simulated objects are used to verify. Food processing is not delayed in order to observe the depletion of real inventory, and food ingredients are not allowed to wait under inappropriate conditions.

The last column of the purchase table is "When to recalculate"

The candidate list should be attached with the sample date, uncovered period, material group, packaging space requirements, temperature zone data version and site conditions. The equipment's arrival route, corners, door openings, cleaning and maintenance distances and energy conditions must also be checked. You cannot just put down a rectangular cabinet on the floor plan to judge whether it can be installed.

The conclusion can be that a candidate is worthy of continued verification, or that the current data is not sufficient for comparison. If the supplier only provides total liters but no internal dimensions, the next step is to request corresponding information or arrange a controlled trial installation; if the observation only covers low passenger flow days, the next step is to supplement representative scenarios instead of using an arbitrary coefficient to enlarge the capacity first.

It is important to preserve the triggering conditions for recalculation. If the menu changes from whole ingredients to a variety of packaged semi-finished products, the total weight of the food may not change much, but the required containers and sorting positions may be significantly different. When delivery frequency, packaging size or service scope changes, the affected material group should be returned to recalculation without having to move the entire selection experience to the next store.

During acceptance, the cargo location assumptions in the procurement stage should also be brought to the actual equipment for verification. When the shelf accessories, internal protrusions or door side structures are inconsistent with the drawings, confirm the supply configuration first, and then modify the available cargo space conclusions. Employees cannot be asked to squeeze the packaging to fulfill the original quantity. Any discrepancy between the equipment actually received and the configuration at the time of comparison should be treated as a delivery discrepancy.

Four doors or six doors are ultimately the result of implementing requirements, not the starting point for judgment. Being able to explain why each cargo slot is needed and what conditions have not yet been confirmed can give procurement a chance to avoid the problem of "the total capacity is sufficient but it is never easy to use".

References

• Cambro The Ultimate Food Storage Guide: Prep, Cooking and Serving
• Interpretation of the China National Institute of Standardization’s GB31654-2021 General Hygienic Standards for Catering Services