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syedzunair
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Supply Network Guru
Re: Capabilities and limitations
syedzunair   3/22/2012 12:18:41 PM
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@cryptoman: 

Thank you for sharing the information. 

However, I would like to add a few things here. 

Operational envoirnment affects all identification techniques. There are different types of RFID tags which are suitable for different purposes. 

The limit on tags is in the thousands. I know of use cases where entire truckload are scanned at once. 

RFID need not be in the line of sight to work. They can work within suitable distance ranges for example, toll tax collection works using RFID's and sensors are capable of identifying vehicles as the pass the checkpost. 

And you are absolutely right that a RFID based solution needs to consider all pros and cons before it is actually implemented. 

Cryptoman
User Rank
Blogger
Re: RFID
Cryptoman   3/22/2012 11:02:04 AM
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Hi Nemos.

Let me provide some comparative information on RFID and Bar codes that you may find interesting.

Advantages of RFID over bar codes:

1 - RFID does not need line of sight to operate.

2 - RFID tags have larger storage capacity

3 - RFID tags are more durable compared to bar codes

4 - RFID offers more flexibility as it can perform intelligent tasks other than simply storing data.

5 - Successive read speeds are higher when a suitable RFID reader is used. A bar code reader can scan one code at a time at a low speed.

6 - RFID has a longer read range than a bar code reader.

7 - An RFID tag can be written many times unlike a bar code.

 

Advantages of bar codes over RFID

1 - Bar codes are cheaper to deploy

2 - Bar code is a mature technology with a large user base

3 - There is no international limitations on bar code usage

4 - Bar codes can tag any material without any issues.

5 - Also, socially use of a bar code is more easily accepted compared to the wireless RFID technology !

 

 

 

Cryptoman
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Blogger
Capabilities and limitations
Cryptoman   3/22/2012 10:46:05 AM
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RFID is a very promising technology in terms of tagging and identification but it does have some limitations.

1 - Current RFID technology does not work well with RF-absorbent objects such as ferrite, which is common in most electronic products.

2 - Operation environment greatly affects the performance of RFID.

3 - There is a practical limit on how many tags can be read in a time window (i.e. there is a processing speed limitation)

4 - Performance is dependent upon antenna orientation and needs to be done carefully to work properly.

5 - The RF energy has limited penetration capability therefore detection can be difficult depending on the location of the tag.

One needs to take all of the above into account when thinking of an RFID based solution.

sohaibmasood
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Blogger
Re: Cost of tagging
sohaibmasood   3/22/2012 10:15:08 AM
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@Barbara: You are absolutely right. Tagging is one of the ways for authenticity control and with proper scanning counterfieting can be identified easily. 

@hm: Your point about the cost is of primary concern to the manufacturing sector. They need to come up with a plan to balance the cost with benefits. Hence, tagging everything might not be possible given the price tag a product has. 

sohaibmasood
User Rank
Blogger
Re: RFID
sohaibmasood   3/22/2012 9:55:54 AM
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Dave, I agree with you on the fact that the technological infrastructure is a pre requisite for implementing any auto identification technique. I am sure that the infrastructure in the developing nations is not at par with that of the US or Europe. But I can assure you things here are not as gloomy as they might look. 

Even in the developing nations paper based environments are being discouraged and enterprises are opting for ERP systems. One key factor for this is because it becomes easier to communicate with the suppliers and the customers. EDI (Electronic Data Exchange) is getting popular in this region. Therefore, RFID or any other identification technique can be deployed. 


sohaibmasood
User Rank
Blogger
Re: RFID
sohaibmasood   3/22/2012 9:46:49 AM
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@Nemos, RFID is not an improved bar code scheme. It is a completely different auto-identification technique that is being used in the industry to identify products. 

Barbara Jorgensen
User Rank
Blogger
Re: Cost of tagging
Barbara Jorgensen   3/22/2012 9:07:08 AM
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@hm: Tagging is one of the ways the electronics industry believes will stop counterfieting. If every item is tagged, then a simle scan will authenticate the product. Unfortunately, becuase so many single components are used in a product, tagging each becomes prohibitively expensive.

_hm
User Rank
Supply Network Guru
Cost of tagging
_hm   3/21/2012 8:27:34 PM
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Is there need for tagging everything? Many product will become costly and conusmer may not like to pay for it. Tagging at final product level or at module level may be worth experimenting.

 

Dave Sasson
User Rank
Supply Network Guru
Re: RFID
Dave Sasson   3/21/2012 8:02:46 PM
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The supply chain in developing countries in which the article mentions many issues with inventory management will require some fundamental upgrades before RFID can be used.  In many cases, the processes employed in these countries are extremely manual and paper based.  Supply chain systems in general will need to be implemented with regular barcode scanning.  RFID can be looked at once the fundamentals are in place to take advantage of other technologies in these countries.  

Nemos
User Rank
Supply Network Guru
RFID
Nemos   3/21/2012 6:59:03 PM
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Can we say that the RFID is an improved bar code way to identify the products ?

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