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By Eva Feng Zhenyu Zhao
May 4, 2017
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During our inaugural Uber Technology Day, data scientist Eva Feng delivered a presentation on Uber’s experimentation platform (XP). In this article, sheand colleague Zhenyu Zhao detail how Uber engineered an XP capable of rolling out new features stably and quickly at scale.

The lifecycle of feature development for a mobile app is composed of identifying opportunities, prototyping, experimentation, launching, refining, and identifying opportunities again. Experimentation is a critical stage of the product lifecycle; it is the process of discovering and determining whether or not new features are successful. Given Uber’s hypergrowth, the goal of our XP is to ensure that new features roll out successfully and then return actionable analysis.

Uber’s XP is unique in the industry because we launch not just experiments but also feature releases on a nationwide and even global scale which can almost immediately improve how people ( and now food ) get around in the physical world.

Initially, this massive scale across both products and markets made it challenging to build an XP that multiple teams with varying programming backgrounds and preferences could understand and use. Today, many teams at Uber use the XP to deploy features for their products, including the rider, driver, and UberEATS apps.

In this article, we will discuss the challenges and opportunities faced when developing our XP’s two primary components—a staged rollout and an intelligent analysis tool—as well as our finished product’s achieved outcomes.

All the World is a Stage(d Rollout)

The first element of the experimentation lifecycle at Uber is a staged rollout, the process of deploying a feature first to a small portion of users and then gradually ramping up to stages with larger proportions. Eventually, we reach 100 percent of all users that fall under a target specification (for instance, geographic location, which can be as small as a district of a city or as large as the entire world).

Consumer electronics company Vizio will host an 80s-themed outdoor picnic this summer for its full-time workers and their families at the beach.

Activities will include kayaking, stand-up paddle boarding and other kid-friendly events.

Technology accessory company ZAGG started the summer with an employee outing to a minor-league baseball game.

Full-time, hourly, and temporary employees that work out of the company's headquarters in Salt Lake City and their families were eligible for the event and 445 people attended.

Employees and their family members got a t-shirt, backpack and food at the ball game.

Correction: An earlier version of this story said that nearly 75% of companies increased benefits to retain workers, according to the Society for Human Resource Management. About a third of all companies have increased their benefits, with 72% of those citing worker retention as the reason.

CNNMoney (New York) First published July 6, 2018: 11:12 AM ET
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Of course, most people would accept a second of torture in return for eternal bliss (or even just very long bliss), but perhaps if the torture was bad enough, they also would change their minds in that moment. This should be taken seriously. It's also a reason why I think small amounts of very bad suffering are far more serious than lots of mild suffering: We're willing to trade mild suffering for mild pleasure even when enduring the mild suffering, but if the suffering becomes intense enough, we might not accept it in return for any amount of pleasure, at least not in the heat of the moment .

Hedonistic utilitarianism allows for a large degree of flexibility in deciding exactly how much happiness and suffering a given experience entails. For example, negative-leaning utilitarians can set the suffering value of a very painful experience as much more negative than a more positive-leaning utilitarian would.

With preference utilitarianism, the utility assignments are more constrained because they should generally respect the observed preferences of the actor, although there are exceptions discussed above in cases like irrationality, time discounting, epistemic error, or major conflict between the brain's high-level output and low-level hedonic reactions. So, for example, when most people say they're glad to be alive rather than temporarily unconscious, we should generally take this at face value and assume their lives are above zero, at least at that moment.

Of course, there remains plenty of wiggle room for preference utilitarians to make judgment calls in deciding when the exceptions apply, as well as through interpersonal-comparison tradeoffs.

In this piece I've mainly discussed selfish preferences: How an actor feels about her own emotions or other affairs regarding herself, such as whether her honor has been tarnished, whether she has been used as a means to an end, or various other concerns that may be more than immediately hedonic but still self-directed.

What about preferences regarding the wider world? One I mentioned already was deep ecologists' preference (which I do not share) for untouched nature, even if no one is around to see it. Various other moral preferences are of a similar type: Wanting to reduce poverty, increase social tolerance, limit human-rights abuses, reduce wild-animal suffering, and so on. In these cases, the actor does not just care about his own experience but actually cares about something "out there" in the world and would continue to care whether or not he was around to see it and whether or not he could fool himself into thinking his goal had been accomplished. I don't want to just feel like I've reduced expected suffering but rather want to actually reduce expected suffering.

Suppose a grandfather's dying wish is to leave his fortune to his favorite grandson. You're the only person to hear the grandfather make this request, and the default legal outcome is for some of the money to go to you, allowing you to donate it to important charities. Is it wrong to not report the grandfather's wish? After all, if you let the default legal outcome happen, you'll be able to donate your share of the inheritance to important charities.

The advent of the Internet has provided the electronic way of book distribution without the need of physical printing, physical delivery and storage of books. This, therefore, poses an interesting question that challenges publishers, distributors, and retailers. The question pertains to the role and importance the publishing houses have in the overall publishing process. It is a common practice that the author, the original creator of the work, signs the contract awarding him or her only around 10% of the proceeds of the book. [10] Such contract leaves 90% of the book proceeds to the publishing houses, distribution companies, marketers, and retailers. One example (rearranged) of the distribution of proceeds from the sale of a book was given as follows: [11]

There is a common misconception that publishing houses make large profits and that authors are the lowest paid in the publishing chain. However, most publishers make little profit from individual titles, with 75% of books not breaking even. Approximately 80% of the cost of a book is taken up by the expenses of preparing, distributing, and printing (with printing being one of the lowest costs of all). On successful titles, publishing companies will usually make around 10% profit, with the author(s) receiving 8-15% of the retail price. However, given that authors are usually individuals, are often paid advances irrespective of whether the book turns a profit and do not normally have to split profits with others, it makes them the highest paid individuals in the publishing process.

Within the electronic book path, the publishing house's role remains almost identical. The process of preparing a book for e-book publication is exactly the same as print publication, with only minor variations in the process to account for the different mediums of publishing. While some costs, such as the discount given to retailers (normally around 45%) [11] are eliminated, additional costs connected to ebooks apply (especially in the conversion process), raising the production costs to a similar level.

Print on demand is rapidly becoming an established alternative to traditional publishing. In 2005, Enjoy Sale Online Sast chest pocket Tshirt Nude amp; Neutrals Christophe Lemaire Free Shipping Genuine Jik0IRVq
announced its purchase of Booksurge and selfsanepublishing, a major "print on demand" operation. CreateSpace is the Amazon subsidiary that facilitates publishing by small presses and individual authors. Books published via CreateSpace are sold on Amazon and other outlets, with Amazon extracting a very high percentage of the sales proceeds for the services of publishing. printing and distributing. One of the largest bookseller chains, Barnes Noble, already runs its successful imprint with both new titles and classics — hardback editions of out-of-print former best sellers. Similarly, Ingram Industries, the parent company of Ingram Book Group (a leading US book wholesaler), now includes its print-on-demand division called Lightning Source. In 2013, Ingram launched a small press and self-publishing arm called Ingram Spark. [12] Payment terms are much closer to those of Amazon and less favorable than those they offer to more established publishers via Lightning Source. Among publishers, Simon Schuster recently announced that it will start selling its backlist titles directly to consumers through its website. [ Womens Bengalin Leggings Adia Sast Sale Online tPDAD
]

The views and opinions expressed in this article are those of the authors and do not necessarily reflect the official policy or position of IBM.
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