Skip to main content

Lesson from the sampling plan of potato chips

I attended a short course on quality sampling plan recently. The course was about how to design a sampling plan for a process. Why we need to do sampling? If not, the producers will need to do 100% inspection on their products. This will incur additional cost to the production. Ultimately, the cost will be absorbed by the consumer, which is us.

During the course, there was a short sharing on how sampling plan activities take place in producing potato chips. The company is one of the renowned potato chips maker – Lays. A packet of Lays’ potato chips will cost you RM8. Maybe because it’s cost USD2 in the States (it’s cheap in US though).

The quality activities start right from the vendor. Vendor will deliver a truck full of potatoes. But first, the company will take sampling to justify the quality of the potatoes before accepting the whole truck. Firstly, the worker will take samples from few points in the truck by placing a bucket. Then the worker will randomly load some potatoes into the bucket. These buckets full of potatoes will be transferred to incoming check counter.

Worker then weigh and inspect a few potatoes accordingly. Some potatoes will be drilled thru a hole and sliced. Thus, each slice will have a hole. These samples will then go through the normal potato chips production process. Towards the end of the process, worker will screen out the holed chips (if you happen to find a potato chip with a hole in your packet, that’s the sample). These holed chips will be subjected to numerous testings (texture, weight etc). If the samples passed the preliminary tests, only then the company will accept the full truck of potatoes. Imagine if the tests are negative. The truck driver will have to deliver back to his plant.

Once the delivery is accepted, potatoes will go through normal process i.e. cleaning, peeling, slicing and frying or baking. As usual, throughout the production process, few samples will be taken to ensure the weight, thickness, salt content and appearance are meeting the requirement. Once the whole production process is completed, the chips will be packed into individual packet. The weight of the packets will be measured as well. Subsequently, the packets will be loaded into a box. Prior sealing the box, worker will randomly inspect a few packets for appearance and weight.

Finally, the boxes of potato chips will be delivered to local retail stores or shipped to other location. The inspection doesn’t stop here. The company hires a regular evaluator to purchase one or two packets from the selected outlets on a timely basis. The evaluator will then feedback the quality of the packet and content to the company.

Such a simple item but it takes lot of work to ensure the quality. This kind of work is adding value to the quality, just as quoted in 1 Cor 3:10-15.

... I laid a foundation as an expert builder, and someone else is building on it. But each one should be careful how he builds....

Comments

Anonymous said…
they do such thing in Malaysia? seriously? i thought it is close-one-eye over here.
HK Jun said…
not sure if our local potato chips maker do that. at least in US yes. so buy imported chips.
Anonymous said…
ah jun sure got high tastes.

Popular posts from this blog

Kaoshiung

I haven't finished recounting my journey in Sweden and Japan; I returned from Taiwan just two weeks ago. Here's a brief account of my recent visit there (although I still have unfinished tale from last year trip to Taiwan). My first stop was Kaoshiung. Spent a day and a half in the town, then I travelled to Tainan for a weekend symposium. I ended my journey in Taipei for another short hike. The weather in Kaohsiung was quite hot, comparatively. It's not my favorite weather for traveling. Perhaps I arrived there too early; had I come a few days later, the temperature would have been cooler. Since day time was hot, it would be wise to visit Pier 2 area during evening or night. Not many people / tourists in this town. It looked quiet.  The next day, I took a ferry to Cijin. The ride was short, about 5 minutes. Cijin Island is a fisherman's village. On the opposite side of the island, there's a beach. It was serene but scorching, to the extent that I couldn't walk m

Qixingshan trail

Had a chance to visit Taiwan again in last November. It was an invitation to attend a symposium in Taichung. So I decided to take a few days to explore Taipei before the conference. But this round I opted for hiking experience. Thus, the search for easy access of hiking venues around Taipei city. One particular blog has provided most of the useful information for my trip: www.nickkembel.com. I picked Qixingshan trail in Yangmingshan National Park as my first choice for the hiking. It's easily accessible with moderate difficulty level of the hiking route. To get to Yangmingshan, one can opt for the public transport right below Jiantan MRT station. The Taipei Performing Arts Center is just opposite the bus stop areas. I took the S15 mini bus which is bound for Lengshuikeng. Waited a few minutes, the bus came. There were many locals heading to the national park on that day. So I had to stand for almost the entire journey. Got off at Lengshuikeng Visitor Center (which is the last two s

Tateyama Kurobe Alpine Route

Just came back from Japan last week. Went to Tokyo for conference and added side trip to Tateyama Alpine Route and Kanazawa. I must say that Tateyama Kurobe Alpine Route was great. You can do the trip either from Nagano side or Toyama side. For us, we did it from the Nagano side. Took the Shinkansen to Nagano early morning. Then boarded the express bus to Ogizawa. From there, we boarded the tunnel electric bus to get to Kurobe Dam. From the dam, it was all the way up to the peak (almost). Murodo is the highlight of the route. This is the place where you get to see snow covered peak and lake. In spring, there's snow wall nearby Murodo station. From Murodo, we descended to Bijodaira and Tateyama Station to catch the local train back to Toyama. The fare for the entire route is not cheap, but it's worth it. A hike from Bijodaira to Murodo should be interesting, which can be considered in future. View from the tunnel electric bus, onward to Kurobe Dam Arrived at Kurobe Dam View of t