Pemodelan dalam suatu rekayasa perangkat lunak merupakan suatu hal yang dilakukan di tahapan awal. Di dalam suatu rekayasa dalam perangkat lunak sebenarnya masih memungkinkan tanpa melakukan suatu pemodelan. Namun, hal itu tidak dapat lagi dilakukan dalam suatu industri perangkat lunak. Pemodelan delam perangkat lunak merupakan suatu yang harus dikerjakan di bagian awal dari rekayasa, dan pemodelan ini akan mempengaruhi perkerjaan-pekerjaan dalam rekayasa perangkat lunak tersebut. Pertama-tama, berikut kami paparkan penjelasan dari pemodelan terstruktur dan object oriented.
Pemodelan terstruktur digunakan dalam analisis sistem, rancangan sistem, dan pengembangan perangkat lunak. Pada dasarnya merupakan pemodelan dengan pendekatan yang baku dan sistematik dengan menerapkan tahapan-tahapan yang sistematik dan bertujuan agar diperoleh hasil berupa suatu informasi yang bermanfaat dan memenuhi kebutuhan pemakai. Pemodelan ini merupakan pemodelan yang sudah lama dipakai. Namun dalam perkembangan pemodelan munculah pemodelan-pemodelan lain, salah satunya adalah Object Oriented.
Pemrogaman Object Oriented atau Pemrograman berorientasi objek merupakan paradigma pemrograman yang berorientasikan kepada objek. Semua data dan fungsi di dalam paradigma ini dibungkus dalam kelas-kelas atau objek-objek. Setiap objek dapat menerima pesan, memproses data, dan mengirim pesan ke objek lainnya. Model data berorientasi objek dikatakan dapat memberi fleksibilitas yang lebih, kemudahan mengubah program, dan digunakan luas dalam teknik piranti lunak skala besar.
Dalam perkembanganya pemrograman object oriented lebih dicari ketimbang pemrograman struktural atau prosedural. Mengapa hal ini bisa terjadi, sementara kita masih bisa menggunakan konsep pemrograman prosedural? Dalam membangun program yang masih sederhana tentunya konsep object oriented ini akan terasa sangat menyusahkan, akan tetapi ketika kita membuat sebuah program yang ruang lingkupnya luas konsep object oriented akan terasa sangat membantu karena akan terasa lebih mudah untuk mengorganisir program yang telah kita buat. Pemrograman ini mempertinggi kualitas dan produktifitas pengembangan software.
Namun hal ini bukan bearti pemodelan struktural ditinggalkan begitu saja. Dalam permasalahan tertentu justru pemodelan ini lebih baik digunakan, khususnya pemasalahan yang dianggap sederhana. Akan tetapi ada satu hal yang bisa kita pastikan dalam pemrogram struktural maupun objek oriented yaitu tujuan dari pemodelan itu sendiri yang mana agar pada akhir proyek sistem dapat diperoleh sistem informasi yang memenuhi kebutuhan pemakai, tepat waktu dan sesuai anggaran, serta mudah digunakan, dimengerti dan dipelihara.
Pemodelan perangkat lunak biasanya lebih dari 60 % dari total biaya pembuatan perangkat lunak. Presentasi ini terus bertambah karena lebih banyak perangkat lunak dihasilkan dan dipelihara. Pembuatan perangkat lunak untuk suatauperubahan adalah penting. Proses perangkat lunak komplek dan melibatkan banyak aktivitas. Oleh karena itu, pemilihan cara pemodelan mana yang lebih baik akan sangat menentukan dalam pembuatan perangkat lunak yang sesuai dengan permintaan pengguna itu sendiri.
The film begins with the armed forces getting a lead on a suspected terrorist. As the man is a recluse, getting a positive ID proves difficult, and the DOD’s computer system recommends that the mission be aborted. From continued aerial surveillance of the area, the suspect is apparently attending a funeral but the possibility that it is a facade makes those present all nervous – the system continues to recommend abort. The Secretary of Defense (Michael Chiklis) agrees with the abort recommendation, but the President orders the mission be carried out anyway. This turns into a political backlash when all those killed turn out to be civilians, and retaliatory bombings are carried out in response. The scene abruptly shifts to the life of Jerry Shaw (Shia LaBeouf), a Stanford University drop out who not only lacks any real direction in his life, but also faces great financial difficulty. He gets a phone call from his parents telling him that his twin brother, Ethan, is dead. Following the funeral, Jerry gets a $1,000 check from his dad. When Jerry tries to deposit the check and withdraw some money from the ATM, he’s surprised to see that his account is filled with a lump sum of money. Soon he returns home to find his apartment filled with a large amount of weapons, explosives, and forged documents. He receives a phone call from an unknown woman, who explains that the FBI are about to apprehend him in thirty seconds and that he must escape. Not believing her, he is caught by the FBI, led by Agent Thomas Morgan (Billy Bob Thornton) and Air Force Office of Special Investigations Special Agent Zoe Perez (Rosario Dawson). The unknown woman arranges Jerry’s escape and has him join up with single mother Rachel Holloman (Michelle Monaghan). Holloman is being coerced into helping by the woman, who threatens to kill her son, Sam, a trumpet player on his way to Washington, D.C. from Chicago for a band recital. The woman helps the pair to avoid the police and FBI units, demonstrating the ability to remotely control virtually any networked device, such as traffic lights, cell phones, and even automated cranes. While Jerry and Rachel follow her instructions, the woman has a crystal explosive made into a necklace and its sound-based trigger placed inside Sam’s trumpet. Jerry and Rachel are led to Washington, D.C. through various means. Along the way, they are introduced to the woman, who is actually a top secret super-computer called ARIA tasked with gathering intelligence from all over the world. ARIA, the overtaken computer, can control virtually anything electronic to that end. In light of the mistake made by the President at the beginning of the film, ARIA has decided that the executive branch is a threat to the public good and must be eliminated. ARIA plans to destroy the President’s Cabinet, and calls this Operation Guillotine. It has decided to leave the Secretary of Defense, who agreed with its recommendation to abort, as the successor to the presidency. She does not reveal this to Jerry or Rachel, merely explaining that she is trying to help the people of the United States. At the Pentagon, where ARIA is housed, Agent Perez discovers that Ethan worked as a technician for the computer and locked it down to prevent ARIA from carrying out her plan. Perez warns the Secretary of Defense and they discuss the situation in a sealed room to prevent ARIA from hearing their conversation. Jerry and Rachel arrive at the Pentagon and are led to the super computer, where ARIA forces Jerry to impersonate Ethan and use an override code allowing her to go ahead with the plan. She then instructs Rachel to eliminate Jerry to prevent the lock from being reinstated, but Rachel cannot bring herself to do it. Rachel is led out of the building by ARIA while Jerry is caught by Agent Morgan. Having been warned by Agent Perez, Morgan believes Jerry’s story and takes him to the United States Capitol. On their way, however, ARIA sends an MQ-9 Reaper UCAV after them. Agent Morgan sacrifices himself to destroy the craft and save Jerry. Meanwhile, Agent Perez returns to the super computer and is successful in destroying it, but not before ARIA uploads roughly a fifth of its memory to another location. Rachel is given the explosive necklace and sent to watch the President’s speech. Sam’s class, whose recital has been moved from the Kennedy Center to the Capitol for the President’s State of the Union Address, begins to play. The trigger that will set off the explosive necklace is set to activate when Sam plays a high F on his trumpet corresponding to the word “free” in the last verse of the U.S. national anthem. Jerry successfully infiltrates the vicinity and fires Morgan’s pistol into the air, stopping the performance and emptying the room, but provoking a Secret Service agent to shoot him in the shoulder. In the aftermath of the chaos ARIA caused, the Secretary of Defense urges that another super computer should not be built. Ethan posthumously receives the Medal of Honor while Jerry, injured but alive and well, receives the Congressional Gold Medal. The film ends with Jerry attending Sam’s birthday party. Rachel thanks him for attending and kisses him on the cheek. She then tells Jerry that she is glad that he is there. After a second of silence, Jerry tells her, “Me too,” and the film ends.
