在回報有問題的手機中，分別取得 117 隻屬於第一批，以及 90 隻，屬於第二批。經過分析，大部分可以歸責於電池的問題，其餘問題、或是未驗出問題的比例較低。
在第一批有問題的 Galaxy Note 7 中，所採用的電池來自於三星 SDI，主要的 72.6% 明顯是電池問題。
而第二批出貨的 Galaxy Note 7 分析結果，因爲更換爲 ATL 的電池芯。所以檢驗出明顯是電池的問題有下降。不過仍然有 61.1% 跟電池有關。但是究竟是電池芯的問題，還是手機結構、電路板、軟體造成電池也會燃燒、爆炸，目前仍然在繼續追查中。「其餘原因」需要更深的分析，以及警惕
無論是第一批 Galaxy Note 7，還是第二批分別有 12.8%，17.8% 的無法找出確實原因。這就更加耐人尋味。
三星表示分析仍會繼續，將找出確實的原因，並且改善。不過從以上的幾個數據來看，明顯 Galaxy Note 7 的問題並非來自於單一原因。這對於往後三星的手機設計、出貨，或是其他品牌的手機都產生了警惕作用。
隨著手機的發展，AP 處理器時脈、核心數大量增加、機型變薄、電池容量變大。在耗電、發熱的同時，還要做到密封的防水。是不是問題僅在 Galaxy Note 7 上發生？還是可能成爲高階手機的潛在問題？值得深究。
這篇遠比中文摘要版多出許多資訊，尤其是在美國與CPSC單位的產品召回之互動.......
http://www.wsj.com/articles/the-fatal-mistake-that-doomed-samsungs-galaxy-note-1477248978?mod=europe&mod=djemITPE_h
The Fatal Mistake That Doomed Samsung’s Galaxy Note
On the verge of challenging Apple’s mobile phone dominance, the South Korean company made a rushed decision, based on incomplete evidence, that later forced it to kill the model.
Attendees gather around display tables to view the Samsung Galaxy Note 7 smartphone during a launch event in August in New York City. PHOTO: DREW ANGERER/GETTY IMAGES
The X-ray and CT scans showed a pronounced bulge.
After reports of Galaxy Note 7 smartphones catching fire spread in early September, Samsung Electronics Co. executives debated how to respond. Some were skeptical the incidents amounted to much, according to people familiar with the meetings, but others thought the company needed to act decisively.
A laboratory report said scans of some faulty devices showed a protrusion in Note 7 batteries supplied by Samsung SDI Co., a company affiliate, while phones with batteries from another supplier didn’t.
It wasn’t a definitive answer, and there was no explanation for the bulges. But with consumers complaining and telecom operators demanding answers, newly appointed mobile chief D.J. Koh felt the company knew enough to recall 2.5 million phones. His suggestion was backed by Samsung’s third-generation heir apparent, Lee Jae-yong, who has advocated for more openness at one of the world’s most opaque conglomerates.
That decision in early September—to push a sweeping recall based on what turned out to be incomplete evidence—is now coming back to haunt the company.
Two weeks after Samsung began handing out millions of new phones, with batteries from the other supplier, the company was forced to all but acknowledge that its initial diagnosis was incorrect, following a spate of new incidents, some involving supposedly safe replacement devices. With regulators raising fresh questions, Messrs. Lee and Koh decided to take the drastic step of killing the phone outright.
Samsung discontinued production of Galaxy Note 7 smartphones after incidents of the phones catching fire. PHOTO: ASSOCIATED PRESS
The Galaxy Note series helped make Samsung a smartphone leader, and the Note 7, its most advanced phone ever, had all the makings of a hit. For a moment, it looked like the Galaxy Note could win over users of Apple Inc.’s iPhone and cement Samsung as one of the world’s most dominant technology companies.
Instead, as a result of the flammable phones and the botched recall Samsung’s leaders are now struggling to salvage the company’s credibility. At risk is the expected February launch of its next flagship smartphone, likely to be called the Galaxy S8.
The U.S. Consumer Product Safety Commission, which oversees product recalls in Samsung’s biggest smartphone market, is expected to investigate whether Samsung notified the agency soon enough of dangers posed by the device. Samsung’s decision to launch its own recall, bypassing the CPSC’s formal process for a time, may have prevented regulators from figuring out more about the root cause, some U.S. lawmakers suspect.
Samsung still doesn’t have a conclusive answer for what’s causing some Note 7s to catch fire.
A Samsung spokeswoman said the company worked quickly with regulators and took immediate action when problems arose with the phone. “We recognized that we did not correctly identify the issue the first time and remain committed to finding the root cause,” she said. “Our top priority remains the safety of our customers and retrieving 100% of the Galaxy Note 7 devices in the market.”
Outside experts have pointed to a range of possible culprits, from the software that manages how the battery interacts with other smartphone components to the design of the entire circuit.
Engineers are also looking into the possibility that the battery case may have been too small to house a battery of that capacity, according to one Samsung mobile executive.
Big product recalls are never easy. Consumers, however, are often willing to forgive mistakes if they believe the company is looking out for them and moving swiftly to address problems.
“What Samsung should have done, very early on, was to share even its preliminary findings or thoughts” with U.S. regulators rather than pushing its own recall, said Stuart Statler, a former CPSC commissioner and independent product safety consultant in Mooresville, N.C.
Samsung executives have delayed the development of the Galaxy S8 device by two weeks as engineers work to get to the bottom of the Note 7’s overheating problem, according to a member of the Galaxy S8 development team.
Meanwhile, investors have shaved off roughly $20 billion in Samsung’s market value. The company has said the recall would cost it $5 billion or more, including lost sales.
Introduced in 2011, the Galaxy Note series has served as a point of pride for the South Korean company, which was long derided for following—and sued for allegedly copying—the iPhone.
The bigger-screen phone was in tune with consumer tastes. When iPhones were shrinking in size, the Galaxy Note anticipated the shift to bigger handsets, which earned it the nickname “phablet,” a mashup of phone and tablet.
By the time Samsung released its third iteration in September 2013, the Galaxy Note was a certified hit, selling 10 million units in two months. The next year, Apple released its first Galaxy Note-sized iPhone.
As word reached Samsung executives that only incremental changes were likely for Apple’s iPhone 7 this year, Mr. Koh and other top executives grew confident about their prospects for a head-to-head fall release of the next version. The company decided to skip the number 6 and jump straight to 7, a name change that would invite direct comparisons with Apple’s model.
Samsung’s engineers packed new features, including an iris scanner, water resistance, an improved stylus and about 16% more battery life than its previous Note device. Presales for the Note 7 started strong after Mr. Koh introduced the device at a lavish event at a theater in Midtown Manhattan on Aug. 2. Analysts boosted their projections for Samsung’s earnings, while investors pushed the stock to record highs.
As user reports of overheating began to trickle in days later, company executives were at first unruffled. Some suspected that many of the alleged incidents had been faked, and argued that even a small number of genuine cases shouldn’t overshadow the fact that millions of smartphones were working fine, according to people familiar with their thinking.
Gathering at Mr. Koh’s office at R5, the 27-story office tower overlooking Samsung’s sprawling Digital City campus south of Seoul, he and other mobile executives, including his predecessor, J.K. Shin, and longtime Samsung top lieutenant G.S. Choi, examined the X-ray and CT scan reports of the phone, which appeared to show heat damage to the internal structure of the battery, according to people familiar with the discussions.
Messrs. Lee and Koh believed they had all the evidence they needed to conclude the problem lay with Samsung SDI’s batteries, these people said. They argued it was more important for Samsung to do “the right thing” and act, in the words of one of the people familiar with the matter, rather than wait for more information. Doing so would have left customers in the dark longer and potentially allowed the crisis to get worse.
On Sept. 2, Mr. Koh entered a news conference room in downtown Seoul to address reporters. Without providing names, he said the company had identified a problem with one of its suppliers and it would shift production to another supplier it believed hadn’t caused the problems.
People familiar with the matter say that the supplier Samsung planned to rely on was Amperex Technology Ltd., a unit of Japanese electronic parts maker TDK Corp.
In Washington, Mr. Koh’s announcement came as a surprise to the Consumer Product Safety Commission. Typically, companies work jointly with the CPSC to study a problem and plan a recall together.
Samsung didn’t notify the CPSC of the problems until later that day, according to people familiar with the matter—about two weeks after the first reported Note 7 incident.
CPSC regulations require companies to report potential product hazards within 24 hours, though the commission allows companies that are “truly uncertain” about an issue to spend a “reasonable time” investigating the situation.
Samsung also took the little-noticed decision to pursue what’s known as fast-track resolution with the CPSC. The program allows a company to shorten the agency’s sometimes-lengthy investigation of a product problem, while avoiding a formal finding by the CPSC of a defect—a maneuver that can insulate manufacturers from product-liability litigation.
The CPSC warns that some companies might not want a fast-track resolution in situations where “complex technical issues…require more time to resolve.”
At first, Samsung’s recall solution seemed to work. Consumers were turning in their phones and asking for new Note 7 phones in about 90% of the cases, Samsung said. The company’s executives basked in praise, particularly from the South Korean press that Samsung executives read obsessively, who credited Samsung with acting swiftly.
The CPSC, though, appeared unhappy with some of the company’s maneuvers. A week after Mr. Koh’s recall announcement, on Sept. 9, the agency took the unusual step of warning consumers not to use the phones while it did more research, and said it would work to determine whether Samsung’s plan to issue replacement phones was “an acceptable remedy.”
A few days later, Samsung and the CPSC finally agreed to a formal joint recall.
Meanwhile, complaints about overheating replacement phones, and of isolated cases of battery failures, began emerging. A Samsung spokesman said initially there was no safety concern.
In China, where the company used only Amperex-supplied batteries in its Note 7s, the company dismissed reported smartphone fires as fabrications, arguing it was impossible for those batteries to have caused problems.
As it became clear the reported problems were multiplying, employees describe a kind of gallows humor setting in. One mobile division executive described the Galaxy Note 7 as a “radioactive” topic, with staffers afraid of even discussing it in the company canteen.
A local television news crew camped outside the offices at 6 a.m. to film a report about how many lights were on at the company, to illustrate the depth of the company’s crisis.
Then came the evacuation of a Southwest Airlines Co. flight in early October because of a smoking Samsung smartphone.
Top executives from major telecoms operators, including Verizon Communications Inc.’s Lowell McAdam, urged Mr. Lee to quickly kill the Galaxy Note 7 smartphone, according to people familiar with the matter. The executives told Mr. Lee the smartphone was becoming increasingly unsalable.
On Oct. 11, Mr. Lee called Mr. Koh and ordered him to discontinue the smartphone. Later that day, Mr. Koh wrote a letter to the company’s mobile division, a copy of which was reviewed by The Wall Street Journal, calling the crisis “one of the toughest challenges we have ever faced.”
While the decision to abort the Note 7 has halted the damage for now, analysts have raised questions about the future of the Galaxy Note series, arguing that the brand has become too tarnished by the crisis and that the company should retire it altogether.
At least two U.S. senators, Bill Nelson of Florida and Richard Blumenthal of Connecticut, have asked for more details about Samsung communication with the CPSC and its handling of the phone crisis. Mr. Blumenthal noted in a letter to Samsung released publicly that so far in the current fiasco, Samsung has reported 96 incidents of batteries overheating in the U.S., including 13 burns and 47 cases of property damage.
Last week, at the urging of CPSC Chairman Elliot Kaye, the agency approved a proposal for a wide-ranging inquiry into lithium ion and related batteries in coming months.
“There are few things in life I’m reasonably confident of predicting; one of those is….we’re going to have yet another issue of lithium ion batteries catching fire” from a range of devices, said CPSC commissioner Robert Adler. “This is just a massive problem.”
—Eun-Young Jeong in Seoul, Ryan Knutson in New York and Takashi Mochizuki in Tokyo contributed to this article.
