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AutomationProcessing

Plant Profile

Making ice cream the safe way

By Jim Carper
ice cream dairy plant operator adds flavoring

An operator adds flavor to a vat. Three 400-gallon flavor vats supply each filling line in the sandwich line room. Source: Vito Palmisano.

ice cream dairy plant operator sandwhich line

The plant has two sandwich lines. Wafers are fed into the filler. Source: Vito Palmisano.

ice cream  plant operator fruit bars

Safeway uses real fruit in its fruit bars. All stick novelties sold in Safeway stores are made in the Bellevue, WA plant. Bars are wrapped automatically, then packaged into cartons manually. Source: Vito Palmisano.

ice cream  plant operator fruit bars

Safeway uses real fruit in its fruit bars. All stick novelties sold in Safeway stores are made in the Bellevue, WA plant. Bars are wrapped automatically, then packaged into cartons manually. Source: Vito Palmisano.

ice cream dairy plant operator adds flavoring
ice cream dairy plant operator sandwhich line
ice cream  plant operator fruit bars
ice cream  plant operator fruit bars
January 7, 2013
Safety first, then efficiency. That’s how Safeway makes packaged ice cream and frozen novelties at its plant in Bellevue, WA. Lean manufacturing principles guide the business.
 
Safeway Inc. takes the mystery out of making ice cream. At its Bellevue, WA, ice cream plant, silos, pasteurizers, stainless steel tubing, flavor vats, fillers and other equipment are all labeled as to their contents or function. There is even a label above a hand-crank pencil sharpener. That was put there either for the benefit of a younger generation raised on hand-held devices (instead of pencil and paper) or else it was an expression of an engineer’s sense of humor.
 
Michael Williams, plant manager for Safeway Ice Cream in Bellevue, operates the plant according to lean manufacturing principles. The essence of the practice is to preserve value with less work. One of the basic tenets views the spending of resources for any purpose other than the creation of value for the end customer to be wasteful.
 
Lean manufacturing is seen in Safeway’s adherence to the 5S method: sorting, straightening, systematic cleaning, standardizing and sustaining. For example, as practiced in Bellevue, “standardizing” is seen in the blue bulletin boards at each production station. These blue-rimmed boards include a standard operating procedures document. Each board also contains start-up and shut-down procedures, a list of ingredient costs, results from the latest 5S audit report and a photograph showing what a clean station should look like.
 

Whether Safeway is making ice cream for its own labels or co-packing for others, the first order of business is to produce safe foods, and then to produce them efficiently. Safeway is retail-focused and retail drives the manufacturing, said Randall Dei, director of US ice cream/industry relations.
 
The company mission, as stated on signs in the plant, is to “deliver superior service and high-quality products at competitive prices.” To help it achieve the mission, Safeway uses a series of process controls. Since the danger in dairy is non-pasteurized milk and ingredients, pasteurization is a critical control point, said Williams.
 
“You have control over critical control points. Everything else supports HACCP [hazard analysis and critical control points] — food safety, consumer perception, economical impacts,” Dei said.
 
The culture at Safeway is to measure everything. That starts at the top, with Steven Burd, the company’s chief executive officer, Dei said. Sharing data is another important behavior in Bellevue. To function as a team, salaried and hourly workers need to know what’s being measured and what the goals are. Dei and the management team write an annual plan for the plant and then they share the costs (but not the profit and loss figures) with employees. The cost of every ingredient in a recipe is available at every ice cream production station in the plant.
 
Safeway’s adherence to lean manufacturing practices also means it is always seeking to improve. If a production problem arises, a team looks for the root cause. As stated on the mission statement, a goal is to have employees “think like a successful owner.” Managers ask employees for input on best practices. Employee incentives for hitting key performance indicators include gift cards, time off or apparel.
 
“We empower the employees and give them the infrastructure” to make improvements, states Williams. “The employees help us. They can control waste and overtime costs, for example.” “We don’t tell them” how to do their job, adds Tim Hughes, the plant superintendent.
 
One of the priorities in a lean manufacturing environment is to perform a root cause analysis of production issues. Kaizen is a system that encourages every employee in an organization to suggest better ways to get the work done. It is continuous improvement, not a once-a-year activity.
 
For example, Safeway tracks customer comments about inclusions (or lack thereof) in ice cream. That spurred a kaizen event at the Phoenix plant, which Bellevue staff attended. The problem solvers found and implemented solutions, and complaints were reduced by 60%, Dei says.
 
The Bellevue plant runs two 8-hour production shifts five days a week. The third shift is cleaning. Every shift begins with a review of the previous one. Managers look at various metrics including efficiencies and down time.
 
“The first hour of performance sets the tone for the whole day,” Dei states. Setting up correctly and starting smoothly set the momentum for the entire shift, he adds.
 
Safeway’s ice cream plant is one building on a large manufacturing campus that includes a fluid milk processing facility, which also produces cottage cheese. All Safeway-branded stick novelties and ice cream cups sold in the US are manufactured in Bellevue.
 
The facility also produces ice cream sandwiches, 1.5-quart rounds and 1.5-quart bricks. Besides manufacturing its own brands, this facility co-packs for other dairy brands.
 
The Bellevue plant was built in the early 1960s and has been upgraded and expanded over the last 50 years. It has six lines — one round 1.5-quart line, one 1.5-quart brick line, two sandwich lines, one stick novelty line and one cup line. During Dairy Foods visit, Safeway was making cookies-and-cream ice cream sandwiches, packaged ice cream (in round containers called “cans” and in bricks) and frozen fruit bars.
 
Cream is piped to the ice cream plant from the fluid milk plant next door. The Seattle-based Darigold dairy cooperative supplies the milk to the milk plant. Tanker trucks deliver condensed skim with 34% solids to the ice cream plant, which is stored in two silos until needed. Safeway also receives tankers of corn syrup blend for sweetening, which also is held in silos.
 
Safeway makes ice cream mixes a day before they are to be processed so that the mix can age and develop flavor, says Hughes. While the skim and cream have already been pasteurized, they are re-pasteurized with other ingredients when it is time to make the ice cream mix. Safeway uses the high temperature/short time (HTST) pasteurization process.
 
Before it is processed, a sample of the mix is sent to the on-site lab to be tested for fats and solids. Components of the mix need to be within Safeway’s acceptable parameters; if they are not, water standardization is used to bring the mix within range for fats and solids.
 
One side of the main processing room is marked “East Sandwich Line” and the other “West Sandwich Line.” Rounds and bricks also are filled in this room. Three 400-gallon flavor vats supply each filling line. Operators at each station measure flavors from plastic jugs into the vats, according to the formula.
 
On the sandwich line, the filler delivers a portion of ice cream, which is then guillotined to fit the cookies, which are fed by hand into the line. The sandwiches are wrapped in paper and then packaged automatically into cartons, which pass across a checkweigher to assure that the correct count is in each carton. Boxes missing sandwiches are rejected. Then they are conveyed to a second-floor room where individual boxes are bundled into “sellable” units, meaning how the retailer wants to receive them, and then to the freezer for hardening.
 
On the brick station, flat cartons are formed, and then the package is filled and sealed, then conveyed upstairs. Every line has a sign showing the production capacity. The brick line can produce 3,600 cartons per hour and 57,600 containers per day.
 
Round cartons, or cans, are filled much like the bricks. The difference is that the round containers are assembled upstairs in a room above the line. An operator feeds blanks into a carton former which forms it into a cylinder. In a separate step, the former adds the bottom. A date and location code is printed on the bottom. The cans and lids are conveyed downstairs to the filler.
 
In a second production area, Safeway makes stick novelties and fills single-serve ice cream cups. Fruit bars consist of a base of sugar water and fruit mix. Depending on the flavor, a bar could contain chunks of fruit. A filler fills the molds (each containing 14 slots). The bars are static frozen as they move through the brine solution. (In comparison, ice cream is frozen while it is agitated in the freezer, Hughes explains.) As the molds reach the end of the line, they are heated slightly, and the bars are removed by their stick end. Then they are wrapped automatically and packaged by hand. With 14 slots in each mold, the line can make 350 bars every 60 seconds. Hourly output is 21,000 bars.
 
All of the ice cream products in this room and the other are conveyed upstairs where they are assembled and wrapped into sellable units. The rounds first have a safety seal band applied around the lid and can. A photo eye detects missing bands. The tapered cans are paired off (upside down and right-side up) for more efficient packaging. The ice cream bricks are assembled into six-packs and then overwrapped. The fruit bars are overwrapped in sets of eight or 12. Then all of the products are conveyed to a tri-tray hardening freezer in the warehouse.
 
Every day in the laboratory, Safeway holds a cutting to test and verify its adherence to quality and manufacturing standards. Quality Manager Darin Huggler leads a quality assurance team through an analysis of the previous day’s production run. Packaged ice cream is butterflied. With the two halves lying side by side, the team performs a visual inspection that considers patterns, texture, consistency and distribution of inclusions. When they evaluate Neapolitan, for example, they look for a clean definition between the chocolate, vanilla and strawberry sections. For the taste test, Huggler first scrapes some ice cream onto a spoon and then rolls it onto another spoon to taste it.
 
“We test everything,” Huggler states. The tests allow Safeway to isolate and pinpoint the root cause of defects, he says.
 
Safeway takes a first, random and last sample of every batch and subjects them to microbial testing and performs plate counts. Ingredients, pre-batch mix, works in progress and finished goods are all tested. Additionally, there are also environmental tests performed.
 
By following the five S’s, Safeway’s Bellevue plant avoids a sixth S — surprises. It is a perfect example of lean manufacturing. Safeway’s retail customers receive value in good-tasting ice cream sold at a competitive price that has been manufactured consistently, batch after batch.
 
This article originally appeared in the October 2012 issue of Dairy Foods (www.dairyfoods.com). 
KEYWORDS: ice cream quality control

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Jim Carper is Editor in Chief at www.DairyFoods.com

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An operator adds flavor to a vat. Three 400-gallon flavor vats supply each filling line in the sandwich line room. Source: Vito Palmisano.
The plant has two sandwich lines. Wafers are fed into the filler. Source: Vito Palmisano.
Safeway uses real fruit in its fruit bars. All stick novelties sold in Safeway stores are made in the Bellevue, WA plant. Bars are wrapped automatically, then packaged into cartons manually. Source: Vito Palmisano.
Safeway uses real fruit in its fruit bars. All stick novelties sold in Safeway stores are made in the Bellevue, WA plant. Bars are wrapped automatically, then packaged into cartons manually. Source: Vito Palmisano.

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