DFD Diagram 0

00:07:54
https://www.youtube.com/watch?v=Ik85hZkyYPA

概要

TLDRVideo pembelajaran ini mengajarkan tentang Diagram Zero DFD, yang diperoleh dari membuka proses dalam Diagram Konteks. Diskusi dimulai dengan pengenalan konteks diagram dan proses Zero, kemudian melangkah ke detail internal sistem seperti proses, penyimpanan data, dan aliran data. Video ini menjelaskan cara menggunakan alat CASE untuk membuat Diagram Zero, termasuk menambahkan aliran data eksternal dan internal. Akhirnya, aplikasi keterampilan yang dipelajari ditunjukkan, dengan sumber daya tambahan untuk mendalami lebih lanjut.

収穫

  • 📊 Diagram Zero DFD memberi detail lebih lanjut dari Diagram Konteks
  • 🔄 Proses Zero mewakili keseluruhan sistem
  • 📈 DFD menunjukkan komponen internal: proses & penyimpanan data
  • 💻 Alat CASE mempermudah pembuatan Diagram Zero DFD
  • 🛠 Aliran data eksternal dan internal harus dihubungkan
  • 🔍 Menggunakan wawancara & observasi untuk mengumpulkan detail
  • 📉 Model dapat dilanjutkan hingga tingkat yang lebih rendah
  • 🏁 Tujuan: menciptakan desain yang akurat dan mudah dipahami
  • 🎓 Lingkungan belajar yang interaktif dan aplikatif
  • 📚 Sumber daya tambahan tersedia di website kursus

タイムライン

  • 00:00:00 - 00:07:54

    Video ini adalah sesi pembelajaran yang memfokuskan pada cara membuat Diagram Zero DFD. Pengantar menunjukkan perbezaan antara konteks diagram dan Diagram Zero, di mana konteks diagram memberikan pandangan keseluruhan sistem dan entiti luar, manakala Diagram Zero memaparkan komponen dalaman seperti proses, storan data, dan aliran data tanpa menambah entiti luar. Kemudian, sesi ini meneruskan dengan membincangkan empat proses utama dalam sistem penggredan dan bagaimana maklumat dikumpulkan untuk membina DFD. Pengguna akan diajarkan cara menggunakan alat cas untuk menghasilkan Diagram Zero DFD, dari pembukaan konteks diagram hingga penambahan butiran dalaman dan sambungan aliran data, dengan penekanan bahawa model DFD boleh diperluas lagi untuk mendapatkan detail yang lebih mendalam mengikut keperluan sistem.

マインドマップ

ビデオQ&A

  • Apa itu Diagram Zero DFD?

    Diagram Zero DFD adalah representasi rinci dari proses dalam sistem yang berasal dari Diagram Konteks.

  • Apa fungsi dari Diagram Konteks?

    Diagram Konteks memberikan pandangan tingkat atas sistem dan entitas eksternal yang berinteraksi dengannya.

  • Bagaimana cara membuat Diagram Zero DFD?

    Dengan menggunakan alat CASE dan mengikuti langkah-langkah berdasarkan hasil wawancara dan peninjauan dokumen.

  • Apa yang ditunjukkan oleh Diagram Zero DFD?

    Diagram Zero DFD menunjukkan komponen internal seperti proses, penyimpanan data, dan aliran data.

  • Apa yang perlu dilakukan setelah membuat Diagram Zero DFD?

    Anda dapat melanjutkan dengan membuat diagram tingkatan yang lebih rendah sesuai kebutuhan sistem.

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オートスクロール:
  • 00:00:01
    welcome to this video learning session
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    when you complete this session you will
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    be able to create a diagram Z
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    DFD in this session you'll learn about
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    diagram zero and how it expands a
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    context diagram to provide more
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    detail how to create a diagram zero
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    DFD and how you can use a case tool to
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    create a diagram zero DFD
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    a context diagram is a top level view of
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    the system and the external entities
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    that interact with
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    it in a context diagram a single process
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    called process zero represents the
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    entire
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    system to see more detail you must open
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    up process
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    zero if you think of process Z as a
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    closed box diagram Zer is what you would
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    see when you take off the cover and look
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    inside diagram zero shows internal
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    components such as processes data stores
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    and data flows but you won't see any
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    additional
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    entities all the entities that interact
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    with the system appear on the context
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    diagram and they don't
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    change this is part two of The Learning
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    session let's begin by zooming in on
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    process
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    zero a set of dfds is like a company
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    organization chart where each level
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    shows additional
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    details using a top- down approach you
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    can work your way down to simple
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    processes that a programmer can
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    translate into program
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    code for now we're only concerned with
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    the next level below the context
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    diagram the grading system which is
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    process zero contains four separate
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    processes established grade book grade
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    student work assign final grade and
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    produce grade
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    report the red line represents the
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    boundary of process
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    zero inside the line you can see the
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    four processes and one data store all
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    connected by various data
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    flows how do we know what details to add
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    as we create the
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    dfds whether it is a new system or an
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    existing system
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    our DFD model is based on the results of
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    interviews surveys document review
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    observations and other fact finding
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    methods now we'll add the same three
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    external entities that appeared on the
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    context
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    diagram next we'll show the data Flows
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    In and Out of process
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    zero these are the same data flows we
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    saw on the context diagram they don't
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    change think of these these data flows
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    as different color wires that disappear
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    into a black box now with the cover off
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    we can see where those wires
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    go the context diagram is shown at the
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    left the entities are the same as
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    diagram Z on the right but diagram Z
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    lets you see the internal
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    details if we hide the details it's like
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    zooming back out to a context diagram
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    View
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    this was a simple example but you would
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    follow the same steps whenever you
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    create a diagram zero
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    DFD this is part three of the learning
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    session where you'll learn how to use a
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    case tool to create a diagram zero the
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    example uses the grading system diagram
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    we created in an earlier learning
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    session after the context diagram the
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    next step is to create diagram Zer it's
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    called diagram Zer because it shows the
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    inner workings of process
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    Z we use the same approach whether we
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    are modeling a new system or an existing
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    system visible analyst organizes all the
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    dfds so it's easy to find the context
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    diagram and click to open
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    it in the context diagram process Z
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    represents the grading system three
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    external entities interact with the
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    system student instructor and Student
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    Records system six data flows connect to
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    the grading
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    system we can rightclick the process
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    zero symbol and then click the explode
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    command this creates a lower level
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    diagram that inherits the overall
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    characteristics of the parent but adds
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    more detail if you think of process zero
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    as the parent the new diagram is the
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    child visible analyst displays the new
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    diagram as a blank page with six data
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    flows that are inherited from the
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    context
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    diagram now we'll add internal details
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    that were not visible in the context
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    diagram We'll add four processes and one
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    data store just as we did when we
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    created the diagram manually
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    we added the symbols so now we're ready
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    to attach the external data
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    flows the next step is to hook up the
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    external data flows to the lower level
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    processes inside process
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    zero with the external data flows
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    attached we can add the internal data
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    flows the Gradebook data store has three
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    input data flows class grade book final
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    grade and student grade and two output
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    data flows grading detail and class
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    detail with the data flows connected the
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    grading system diagram zero is
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    done we could show the external entities
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    on the diagram but it's not necessary
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    because they don't change from the
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    context diagram to diagram zero the
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    model mod in process can continue many
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    levels Beyond diagram zero as the
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    textbook
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    explains for example we could explode
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    each of the internal processes and add
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    more detail at each level when is the
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    model finished that depends on the
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    complexity of the
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    system the goal is to create a design
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    that is accurate easy to understand and
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    will meet business and user
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    needs in in this session you learned
  • 00:07:02
    what a diagram zero DFD is and how it
  • 00:07:05
    relates to a context
  • 00:07:07
    diagram how to create a diagram zero DFD
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    and how to use a case tool to create a
  • 00:07:14
    diagram zero
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    DFD for more information you can refer
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    to the textbook or your student study
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    tool now it's your turn to apply your
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    skills and check your work for
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    background information tasks to complete
  • 00:07:31
    and Sample answers go to the management
  • 00:07:33
    information systems coursemate at
  • 00:07:37
    www.cengagebrain.com
  • 00:07:40
    select this text and navigate to the
  • 00:07:43
    video learning
  • 00:07:44
    sessions thanks for attending this video
  • 00:07:46
    learning session
タグ
  • Diagram Zero DFD
  • Diagram Konteks
  • Alat CASE
  • Proses Zero
  • Penyimpanan Data
  • Aliran Data
  • Sistem Penilaian
  • Pembelajaran Video
  • Metode Wawancara
  • Analisis Sistem