What is the best way to write a job description ?

Method1 of3: Presenting Basic Information

1. Define the position.
2. List the required skills and qualifications.
3. Include contact information.

Method2 of3: Describing Your Company

1. Encapsulate the company's mission.
2. Convey a sense of the company's personality.
3. Include important company details.

Method3 of3: Including Optional Details

1. List the salary and benefits.
2. Include instructions for resume and cover letter formatting.
3. Give an application deadline.

I am totally agree with Mr. Sayyid Jamolkhon al-Orifkhoja, he has described in detail about the question raised in.

To write proper JD to be used inside the company only  "Not to be posted as a vacancy ".

 You should mentioned two main points 

1- KPA “Key Performance Areas” or Accountabilities required for this particular job.

2- Competencies required fulfilling such of this position.

 While Mr, Sayyid Jamolkhon al-Orifkhoja  Answer will suite better for JD To be used as Vacancy post

Regar 

• It describes the skills and competencies that are needed to perform the role;
• It defines where the job fits within the overall company hierarchy;
• It is used as the basis for the employment contract; and
• It is a valuable performance management tool.

Deciding the job title with the key performance areas relating same to the level of skills required, including reporting, span of control and multi dimentional work if any related to the profile.

Thank you.