SDLC (Systems Development Life Cycle, siklus hidup pengembangan sistem), dalam rekayasa sistem dan rekayasa perangkat lunak, adalah proses pembuatan dan pengubahan sistem serta model dan metodologi yang digunakan untuk mengembangkan sistem-sistem tersebut. Konsep ini umumnya merujuk pada sistem komputer atau informasi.


Dalam rekayasa perangkat lunak, konsep SDLC mendasari berbagai jenis metodologi pengembangan perangkat lunak. Metodologi-metodologi ini membentuk suatu kerangka kerja untuk perencanaan dan pengendalian pembuatan sistem informasi, yaitu proses pengembangan perangkat lunak.


SDLC merupakan alur kerja baku yang biasa dipakai oleh perusahaan-perusahaan vendor software dalam mengembangkan software aplikasi produksinya. SDLC ini tidak hanya penting untuk proses produksi software saja, namun terlebih juga sangat penting untuk proses maintenance software itu sendiri, karena tanpa pengarsipan data-data development suatu software, maka akan sangat menyulitkan perusahaan dalam maintenance software tersebut dikemudian hari.

SDLC ini seharusnya dapat menghasilkan suatu sistem aplikasi yang sesuai dengan harapan konsumen, dapat diselesaikan dalam waktu dan biaya yang telah ditentukan, dapat berjalan efektif dan efisien dalam infrastrukur teknologi informasi sekarang dan pada masa yang akan datang. Sistem juga harus mudah untuk dikembangkan untuk merespon berbagai kebutuhan organisasi/perusahaan pemakainya.

SDLC berfungsi untuk menggambarkan tahapan-tahapan utama dan langkah-langkah dari setiap tahapan yang secara garis besar terbagi dalam tiga kegiatan utama, yaitu :
a. Analysis
b. Design
c. Implementation
Setiap kegiatan dalam SDLC dapat dijelaskan melalui tujuan (purpose) dan hasil kegiatannya (deliverable).

date Jumat, 26 Februari 2010

from : General Manager Date : August 3rd
To : Production manager Re : Jersey Contract

URGENT : ORDER NO 184/34
  1. The above client is threatening legal action if this order does not reach him before 25th sept we would probably win his case. He already owes us 17.000 which may well become a bad debt.
  2. Cloth from Bonardi has now arrived we must start production this week.
  3. Completion date must be brought to mid-september. Which means working overtime. Please advice me of the effect of this on all other order.

date Kamis, 10 Desember 2009

Transport manager : when did you find out? (a)
Truck driver : Only a few minutes ago. (4)

Transport manager : Were they all there when you dropped your first load in Manchester? (b)
Truck driver : Yes, they were, as far as I know. (5)

Transport manager : What's the matter ? (c)
Truck driver : I'm four chairs short. (3)

Transport manager : Where are you speaking from? (d)
Truck driver : Brampton. (1)

Transport manager : Where else did you stop ? (e)
Truck driver : I didn't stop anywhere else. I drove straight here from Manchester. (7)

Transport manager : Is everything O.K.? (f)
Truck driver : No it isn't. That's why I'm ringing. (2)

date

Dear Mrs. Liana,

Ref. Your letter 11.11. JH/ch

Thank you for your letter of November 11th. We fully appreciate your concern, and would like to assure you that we shall endeavour to settle our account with you int the immediate future. We wish make an alternative suggestion. We would like payments by instalment within 6 months plus interest.

As you know, there have been problems with our debtors, they are slow to pay. But there have been resolved, we have recently negotiated a substantial contract for a series of conferences to bo held throughout the coming year.

In view of all these prospects we are confident that we shall be able to clear any outstanding debts.

Thank you for your assistance and patience, also for the excellent service your company has given us in the past.

Yours sincerelly,

Anggun dita p

date Kamis, 26 November 2009

1. Active

  • You have not pay your bill.
  • I will pick him up at 7.am.
  • The board did not show immediete interest.
  • We cannot find any record of this account.
  • We will have to made salary cut and shorten holidays.
  • We have made a mistake and incured a loss.
2. Passive
  • Your bill has not been paid.
  • He will be picked up at 7.am.
  • No immediate interest was shown by the board.
  • No record of this account can be found.
  • Salary cuts will have to be made and holidays shortened.
  • A mistake has been made and a loss incure.

date

Dear Sir,

The driver telephoned me on the 15th January. He reported that when he unloaded in Brampton, he found four chairs missing. When denied he questioned that he had ever left the truck. He insisted that he had not stopped anywhere en route and maintained that he had never seen anything suspicious. Even when he stopped for lunch he protested that lorry was not out of his sight at any time.

Your sincerely.

date Rabu, 25 November 2009

Dear Mr. Djhon,

I am sorry see that despite our previous request, the above account have still not been settled. We wrote to you in August and in September, but have recieved no payment to date. When we originally negotiated the contracts we gave you specially low prices on the understanding that payments would be made within 30 days of the date of invoices. Here is a breakdown of the situations as it stands today:

Invoices
july 31st 339/C 4500 Overdue
august 31st 921/G 12000 Overdue
September 980/G 1800 Now due
October 0210 4000 Due November 30th
22300

Could you please arrange for July and August amounts to be paid in full and for the cheque to be sent to this office before Monday November 10th.
If for any reason this cannot be done, please get in touch with me immediately.

Your sincerely.

date