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Product Design Specification

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Title: Product Design Specification


1
Product Design Specification
  • Eng. Nabil Ahmed Mourad
  • B.Sc. Cairo University Mechanical
    Engineering.M.Sc. Arts Et Metier, France,
    Thermodynamics.Abu Dhabi Company for Onshore Oil
    Operation.Engineering Services
    Department.April 2001

2
Product Specification
  • Table of Content
  • Types.
  • Structure.
  • Forms.
  • Typical Content of specification.
  • Preparation of specification.
  • Continual improvement.

3
Types of Specifications
  • International Standards
  • Industrial Standards.
  • Company Specification.
  • Project / product specific.

4
Engineering Standards - Structure
International Standards
Order of Precedence
Industry
ADCO Engineering Standards
Project Specification
Progressive development
5
International Standards
  • ISO Definition
  • Document, established by consensus and approved
    by recognized body, that provides. For common and
    repeated use, rules, guidelines or characteristic
    for activities or their results, aimed at the
    achievement of the optimum degree of order in
    given context.

6
International Standards
  • Examples
  • British Standards. BS
  • American Petroleum Institute. API
  • American Society for Mechanical Eng. ASME
  • Dutch Industrial Norm. DIN
  • International Standard Organization ISO

7
Industry Standards
  • Document developed by a recognized international
    industrial organization operating in specific
    industry to formalizes polices and provide rules
    and guidance for the initiation, generation and
    maintenance of design and Engineering practices,
    learned over a period of time and resulted from
    diversified application.

8
Industry Standards
  • Examples
  • Shell DEP
  • British Petroleum BPS
  • Mobil Standards MS
  • Exxon Standards ES

9
Local / Company Standard
  • Document developed by an operating company to
    provide technical guidance and recommendations
    based on the experience gained in the company,
    for specific operation, over a considerable
    period of time and in a specific geographical
    location.
  • Examples
  • Gulf standard for cars.
  • Saudi Operation Specification. SOS
  • Petroleum Development Oman. POD

10
Project / Product Specification
  • Document developed to define the technical
    requirements that apply for specific project or
    product.
  • Examples
  • Abu Dhabi North East Oil development
  • Rolls-Roys Cars.
  • GE refrigerators.
  • Masafi bottled water.

11
Forms of Specification.
  • Stand-alone specifications
  • Fully elaborated document contains all technical
    requirement. They requires extensive efforts to
    prepare and maintain with lot of repetition.
  • Amendment to applicable standards
  • Brief document referring to the existing
    standards and specify changes as applicable
  • Functional specifications.
  • It is a statement of requirement.

12
Typical content of specification.
  • Technical requirement.
  • Process - Design - Material - Testing
  • Code requirement.
  • Health Safety and Environment.
  • Customer needs.
  • Market requirement.
  • Manufacturer-ability/Construct-ability.
  • Operability / Maintainability.
  • QA / QC requirement.

13
Development of Product specification
  • Preparation.
  • This is the most critical engineering activities
    where customer requirements are defined by
    experienced engineer
  • Review.
  • This includes the multi discipline review for
    checking correctness, completion and maximizing
    value.
  • Approval.
  • Authorization of the document by the most senior
    technical authority in the organization.
  • Revision control.
  • A mechanism that control the changes to
    specification and sustaining the technical
    integrity of the specification.

14
Preparation of Specification
  • Define the basic functions using Verbs and Nouns
    Ex. Pump - Water Cool - Air
  • Transport - Goods Cut -
    Metal
  • Define the basic duties using quantities and
    units.
  • Ex. Flow 1000 M3 /
    hr.
  • Inlet Temp. 40.0 Degree
    Centigrade.
  • Inlet Pressure 2.0 bars
  • Outlet Pressure 20 bars.

15
Preparation of Specification
  • Check process conditions
  • Ex. Water composition Alkalinity/Acidity
  • Solid content Gas/water ratio.
  • Operation conditions
  • Ex. Fixed / Variable duties Variances.
  • Site conditions
    Reliability.
  • Determine design features
  • Ex. Pump type Driver
    type.
  • Protection systems
    installation.

16
Preparation of Specification
  • Select Material
  • Ex. Serviceability Availability
  • Manufacturing Maintenance
  • Durability Cost effectiveness
  • Testing
  • Criticality Mech. String test.
    Performance test Durability test.
  • Code requirement
  • Basically listing the applicable codes and
    standards

17
Preparation of Specification
  • HSE requirement
  • Ex. Noise level Personal protection
  • Leaks / Vents Safeguarding
  • Customer needs
  • Ex. Service-life Availability
  • Utilities Painting
  • Dimensions Weight
  • Market requirements.
  • Consider your competitors, Customer expectation
    and market trends.

18
Preparation of Specification
  • Manufacturing
  • The proposed design should be checked for ease of
    manufacturing i.e. the industry can realize the
    product at the most cost effective matter using
    proven technologies with minimum risk.
  • Operability / Maintainability
  • The design should provide operation friendly
    product that will deliver its objective over the
    intended service life without any major break
    down or excessive frequent maintenance efforts.

19
Preparation of Specification
  • Quality Assurance
  • Assess the supplier by requesting information
    on
  • - Quality system - Technical know-how
  • - Production capacity - Financial status
  • Quality control
  • Specify the Q/C requirement in the requisition
  • - Periodic audits - Inspection
  • - Witnessing tests - Review Q/C
    documents
  • - Audit Q/C procedure - Certification

20
Continual Improvement
  • New Technology.
  • Latest developed that enhance value
  • Customer feedback.
  • User feed back is the most valuable information
    for improvement
  • Competitive specification.
  • Benchmark with others to be the world class
  • Market trends.
  • Reading the future market trends will make you
    the front runner.

21
Remember
  • Standards exist
  • to be used
  • to be critically examined
  • to be modified if not suitable
  • We are most at risk with complex systems whether
    during manufacturing, use or modify. Standards
    are our save guarding system.
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