The comparison and analysis of all kinds of storage
Storage is more and more popular and is used more and more widely in China; many companies adopt warehouse and delivery center (DC); some third-party logistic companies set warehouse and DC in airport, dock and protecting tax district. For many companies have its own industrial character, different situation and circulation of goods should choose different storage; appropriate storage would bring some unexpected benefit, and then you can save large part of investing and operating cost.。
There are several kinds of comparison and analysis of storage in the follow; all these are personal experience of author; the author contacts with many logistic companies, so he wants to intercourse with some experts who engage in logistics. At the same time, it also brings revelation and help to other logistic colleagues. 。
Storage system means shelves’ arrangement and structure warehouse and delivering device, warehouse management software and device in the whole. Here, we just discuss the arrangement of shelves and delivering device. (Now, we do not discuss the management software, you can decide it according to the situation of clients.)
There are several familiar storage systems in the following: Very Narrow Aisle (VNA) system, Derive-In shelf system, Selective shelf system, Double Deep shelf system; there are also some less frequently method, such as Push & Pull, Gravity and Mobile. Because the earlier investment cost and later maintain cost are very high, so we do not discuss it; and AS&RS system does not discuss auto-storage system。
In order to compare, we set some parameters on the same base。
Same comparing parameter:：
a、Size of warehouse: 48000 mm（Length）×27000 mm（Width）×7000 mm（Height）
Height of VAN warehouse 10,000mm, the building cost is near same
bSize of caliper / salver: 1000 mm（Width）×1200（Depth）×1300 mm（Height）
c、Weight of caliper / salver (including goods): 1000kg
d、All goods are divided into four layers and VAN warehouse are divided into six layers
Comparing content：
Compare the capacity of warehouse, the type of forklift truck and the best proportion between performance and price in different warehouse。
（一） VAN System
·Goods enter first and exit first。
·Apply to higher building, such as about 10m warehouse
·Demand strictly to the ground, and you need install orbit on the floor
·Use person-type VAN forklift truck, worth 580,000.00 RMB
·Aisle of forklift truck: 1760 mm
·Total goods: 2,088 calipers
·Total cost of shelf: 417,600.00 RMB
·Total cost of warehouse: 1,296,000 RMB
·Total cost of projects: 2,571,600.00 RMB
·Average cost of system: 1,232.00 RMB per caliper
（二） Drive-In shelf system
·Goods enter fist and exit last, so it is hard to get goods separately
·High density apply to small area and appropriate height warehouse
·It is suitable for the single goods, stocking and sale in batches
·Use electro-motion balance heavy forklift truck, worth 225,000.00 RMB
·Aisle of forklift truck: 3200 mm
·Total goods: 1812 calipers
·Total cost of shelf: 435,000.00 RMB
·Total cost of warehouse: 1,231,200 RMB
·Total cost of projects: 1, 891，200.00 RMB
·Average cost of system: 1044.00 RMB per caliper
（三） Selective shelf system
·Goods enter fist and exit first
·No special demand to goods, and apply to all kinds of goods
·Traditional warehouse, small capacity
·Use electro-motion and pre-moving forklift truck, worth 260,000.00 RMB
·Aisle of forklift truck: 2800 mm
·Total goods: 1244 calipers
·Total cost of shelf: 162，000.00 RMB
·Total cost of warehouse: 1，231，200 RMB
·Total cost of project: 1，653，200.00 RMB
·Average cost of system: 1328.00 RMB per caliper
（四）Double Deep shelf system
·Goods enter first and exit last, half of them can be used as selective shelf, and it is moderate to fetch goods
·Large capacity and it can compare with VAN shelf.
·No special demand to goods and warehouse, use widely.
·Use stand-drive high truck and telescopic forklift, worth 250，000.00 RMB.
·Aisle of forklift truck: 2800 mm
·Total goods: 1716 calipers
·Total cost of shelf: 240, 000.00 RMB
·Total cost of warehouse: 1，231，200 RMB/FONT>
·Total cost of project: 1，721，200.00 RMB
·Average cost of system: 1003.00 RMB per caliper
Collect comparing contents ：
Projects / System |
VAN system |
Drive-In system |
Selective system |
Double Deep system |
Types of forklift truck |
person-type VAN |
electro-motion balance |
pre-moving type |
stand-drive |
Aisle of forklift truck |
1760mm |
3200 mm |
2800mm |
2800mm |
Speed to fetch goods |
Fast |
slow |
fast |
moderate |
Goods amount |
Moderate |
high |
common |
higher |
Using ratio of room |
better |
good |
common |
higher |
Demand to ground |
high |
higher |
common |
moderate |
Warehouse height |
high |
moderate |
higher |
moderate |
Cost of forklift truck |
580，000.00 RMB |
225，000.00 RMB |
260，000.00 RMB |
250，000.00 RMB |
Cost of shelf |
417，600.00 RMB |
435，000.00 RMB |
162，000.00 RMB |
240，000.00 RMB |
Cost of warehouse |
1，296，000 RMB |
1，231，200 RMB |
1，231，200 RMB |
1，231，200 RMB |
Cost of project |
2，571，600 RMB |
1，891，200 RMB |
1，653，200 RMB |
1，721，200 RMB |
Total goods |
2088 calipers |
1812 calipers |
1244 calipers |
1716 calipers |
Average price per caliper |
1232 yuan per caliper |
1044 yuan per caliper卡 |
1328 yuan per caliper |
1003 yuan per caliper |
VAN system: utilize the space of warehouse efficiently (smallest aisle), at the same time, it can guarantee good speed to fetch goods and choose conditions (each salver can save, fetch and choose freely). Each device of this kind of warehouse system can save and fetch goods at 30~35 salvers per hour; it applies to various field, especially in many species or save and fetch goods quickly, DC for example. If the warehouse is larger, the in-out mount will be larger, and then the increase of the device is not very much, so it decreases the cost oppositely. In recent years, this kind of warehouse is more and more popular, especially large warehouse or DC.
Drive-In system: Utilizing the space of warehouse efficiently (large density on shelf arrangement), but can not satisfy the saving and fetching speed and demand of choice. Every salver can not save, fetch and choose freely, so it is suitable for single industry. It is very slow to fetch goods with this kind of warehouse system, 10~12 salvers per hour; if the in-out amounts are increased, you should add more device, and then the cost will increase quickly. This kind of system is used in a few of industries.
Selective system: this kind of warehouse is the widest; it can not utilize the space of warehouse effectively, but it can guarantee good speed to fetch goods and choose conditions (each salver can save, fetch and choose freely). This kind of warehouse can save and fetch goods at 15~18 salvers per hour; it applies to various fields. If the warehouse is larger, the in-out mount will be larger, and then the increase of the device is very large, so the cost increases; but it is very flexible, and the third-party logistic warehouse usually use this system (for the clients will change).
Double Deep system: it is complex body between Selective and Drive-In system; it not only can utilize the space of warehouse efficiently (large density on shelf arrangement), but also can guarantee good speed to fetch goods and choose conditions (Every two salvers can save, fetch and choose freely). Each device of this kind of warehouse system can save and fetch goods at 12~15 salvers per hour; it is very flexible; if the warehouse is larger, the in-out mount will be larger, and then the increase of the device is not very much, so its cost is not change basically. In recent years, this kind of warehouse is more and more popular, without industrial limit, but not too much goods species.
In a word, each kind of warehouse has its own character, so each company can choose the best appropriate and proportion between performance and price according to its own character. Of course, each system is not independent completely, so you can integrate together. (According to different logistic method, in-out speed, goods species and in-out amount to choose)
The author has many experiences on this part, so want to intercourse with same workers; we also can discuss the problem without discuss in this part. |
