Note: General requirements shall
be to MIL-STD-490A, DEF STAN
05-28, and MIL-STD-483A.
This Specification establishes
the performance, design, development, and test requirements for
the insert Item Name, if applicable insert abbreviation,
insert Item (Subsystem, etc) code prime item used on the
???? system.
State the purpose of the system,
and identify the major functions the prime item performs and describe
the role of the prime item within the system or subsystem of which
it is part.
This Development Specification has
been produced during the System Design Phase, for compliance with
the Systems Engineering Management Plan (SEMP).
Before completion of the Critical Design Review (CDR) for the
HWCI this specification will establish part of the Functional
Baseline and subject to change using the Configuration Management
Plan.
This document has been compiled in
the following order.
Section 1 - identifies, states the
purpose and introduces the document
Section 2 - lists the applicable documents
Section 3 - defines the requirements
for the identified prime item to be developed.
Section 4 - quality assurance provisions
Section 5 - preparation for delivery
Section 6 - provides a list of definitions,
abbreviations and acronyms
Insert here any other information
to summarize any other items regarding the purpose and contents
of the document.
SYSTEMS ENGINEERING MANAGEMENT PLAN
(SEMP)
CONFIGURATION MANAGEMENT PLAN
Identify here by title and identifier
any other project specific documents referenced by this document
(i.e., system/Subsystem Specification, etc) and not identified
in any higher level documents.
List by title and Indent. Any other
documents referenced by this document and not identified in any
higher level documents.
e.g., STANDARDS, SPECIFICATIONS, DRAWINGS
and OTHER PUBLICATIONS.
This section shall contain the following:
a. The performance and design requirements
for the prime item.
b. The performance requirements related
to manning, operating, maintaining, and logistically supporting
the prime item to the extent these requirements define or constrain
design of the prime item.
c. The design constraints and standards
necessary to assure compatibility of prime item components.
d. The principle interfaces between
the prime item being specified and other configuration items with
which it must be compatible.
e. The major components of the prime item and the principal interfaces between such major components (Examples of major components are:
(1) a unit of an electronic set,
(2) an engine for a vehicle,
(3) a power drive for a rocket or missile
launcher).
f. The allocation of performance to,
and the specific design constraints peculiar to, each major component.
g. The identification and relationship
of major components which comprise the prime item.
h. The identification and use of Government-furnished
property to be designed into and delivered with the prime item,
or to be used with the prime item.
Unless purely descriptive by nature, requirements shall be stated in quantitative terms with tolerances which can be verified by subsequent analytical test, demonstrative data, or inspection of the prime item and related supporting engineering data.
Requirements stated herein shall be
the basis for, and verifiable by the tests specified in section
4 of the specification.
This paragraph shall incorporate (directly
or by reference) specific products of systems engineering and
analysis which graphically portray the functions of the prime
item and the relationship of the prime item to be developed to
other configuration items in the system. It shall identify (a)
the major components of this configuration item and (b) the individual
components which must be developed. Essentially, this is a translation
of operational requirements into item development tasks.
This paragraph shall incorporate, where
applicable, either directly or by reference, the prime item level
functional schematics. This paragraph will cover the top-level
functional flow diagrams of the configuration item and include
diagrammatic presentations to the level required to identify all
essential functions.
This paragraph shall cover the functional
and physical interfaces between (a) this prime item and other
configuration items, and (b) the major components within this
prime item. The functional interfaces shall be specified in quantitative
terms of input/ output voltages, accelerations, temperature ranges,
shock limitations, loads, speeds, pitch and roll rates, etc. Where
interfaces differ due to a change in operational mode, the requirements
shall be specified in a manner which identifies specific functional
interface requirements for each different mode. Physical interface
relationships shall be expressed in terms of dimensions with tolerances.
This paragraph shall incorporate, either directly or by reference,
interface control drawings, and other engineering data as necessary
to define all functional and physical interfaces required to make
the prime item compatible with other configuration items and to
make its major components compatible within the prime item.
This paragraph shall include a complete
list of all major components, as they become known, which comprise
the prime item with their identification documents arranged in
an indentured relationship.
This paragraph shall list the Government
furnished property which the prime item shall be designed to incorporate.
This list shall identify the property by reference to its nomenclature,
specification identification, and/or part number.
This paragraph shall list the Government
property which will be loaned to the contractor.
Development specifications shall specify
all required performance characteristics, physical characteristics,
and requirements for reliability, maintainability, relative priority
of design disciplines or characteristics.
Performance characteristics shall state
what the prime item shall do, including both upper and lower performance
limits. As a general guide include such considerations as:
a. Dynamic actions or changes that
occur (rates, velocities, movements and noise levels).
b. Quantitative criteria covering endurance
capabilities of the prime item required to meet user needs under
stipulated environmental and other conditions, including minimum
total life expectancy. Indicate required mission duration and
planned utilization rate.
These characteristics shall include
general and detail requirements, under appropriate sub-headings,
for all performance requirements, i.e., what is expected of the
system, configuration item, or material.
This paragraph shall include the following,
as applicable:
a. Weight limits of the prime item.
b. Dimensional and cube limitations,
crew space, operator station layout, ingress, egress, and access
for maintenance.
c. Requirements for transport and storage,
such as tie-downs, pallets, packaging, and containers.
d. Durability factors to indicate degree
of ruggedness.
e. Health and safety criteria, including
consideration of adverse explosive, mechanical, and biological
effects. Included in this criteria are the toxicological effects
of the prime item on the user and the adverse effects of any electromagnetic
radiation that might emanate therefrom.
f. Vulnerability factors including
consideration of atomic, chemical, biological, and radiological
operations, electromagnetic radiation, fire and impact.
g. Security criteria specify security
classification.
h. Command and Control requirements.
This paragraph shall state the requirements
for reliability in quantitative terms, defining the conditions
under which the requirements are to be met.
Reliability requirements shall be stated
numerically with confidence levels, if appropriate, in terms of
mission success or hardware mean time between failures. Initially,
reliability may be stated as a goal and a lower minimum acceptable
requirement. During contract definition, or equivalent period,
realistic requirements shall be determined and incorporated in
the specification with requirements shall never be stated as a
goal in Product Specifications.
This paragraph shall specify the quantitative
maintainability requirements. The requirements shall apply to
maintenance in the planned maintenance and support environment
and shall be stated in quantitative terms.
Examples are:
a. Time (e.g., mean and maximum downtime,
reaction time, turnaround time, mean and maximum time to repair,
mean time between maintenance actions).
b. Rate (e.g., maintenance man-hours
per flying hour, maintenance man-hours per specific maintenance
action, operational ready rate, maintenance hours per operating
hours, frequency of preventative maintenance).
c. Maintenance complexity (e.g., number
of people and skill levels, variety of support equipment).
Numerical maintainability requirements
shall be stated in such terms as mean-time-to-repair (MTTR) or
maintenance man-hours per flight/operational hour. Determination
of realistic requirements shall be made as discussed in 3.2.3
for reliability. Quantitative requirements for accessibility,
modular construction, test points, and other design requirements
may be specified as required.
Describe both induced and natural environmental
conditions expected to be encountered by this prime item during
storage, shipment, and operation. It shall include factors such
as climate, shock, vibration, noise, and noxious gases.
This paragraph shall include the requirements
for transportability which are common to all components to permit
employment and logistic support. All components that, due to operational
or functional characteristics, will be unsuitable for normal transportation
methods shall be identified.
This paragraph shall specify minimum
prime item design and construction standards that have general
applicability and are applicable to major classes of equipment
(e.g., aerospace vehicle equipment, support equipment) or are
applicable to particular design standards. To the maximum extent
possible, these requirements shall be specified by reference to
the established military standards and specifications. In addition,
this paragraph shall specify criteria for the selection and imposition
of National, military, and contractor specifications and standards.
Minimum or essential requirements that
are not controlled by performance characteristics, interface requirements,
or referenced documents shall be specified. They shall include
appropriate design standards, requirements governing the use or
selection of materials, parts and processes, interchangeability
requirements, safety requirements, and the like.
This paragraph shall specify those
prime item-peculiar requirements governing use of materials, parts,
and processes to be utilized in the design of the prime item.
It shall also contain specifications as necessary for particular
materials and processes to be utilized in the design of the prime
item. Special attention shall be directed to prevent unnecessary
use of strategic or prime materials. A strategic and prime materials
list can be provided from the contracting agency. In addition,
requirements for the use of standard and commercial parts for
which qualified products lists have been established shall be
specified here.
Requirements for materials to be used
in the item or service covered by the specification shall be stated
under this heading, except where it is more practicable to include
the information in other paragraphs. Requirements of a general
nature should be first, followed by specific requirements for
the material. Definitive documents cover materials of the required
quality.
Where applicable, requirements pertaining
to electromagnetic radiation shall be stated in terms of the environment
which the item must accept and the environment which it generates.
This paragraph shall contain requirements
for nameplates, part marking, serial and lot number marking, and
all other identifying markings required for the prime item and
its component parts. Requirements shall usually be stated in general
terms and reference made to existing standards on the content
and application of such markings.
The nameplate or markings in some cases
may be the only means of identification of a product after delivery.
Such identification is important from the stand-point of stack,
replacements, and repair parts. All requirements pertaining to
nameplates or markings shall be placed under this, or other appropriate
heading, referencing applicable specifications, drawings, or standards.
This paragraph shall contain workmanship
requirements for development models (A and B) of prime items to
be produced during development, including requirements for manufacture
by production techniques, if applicable.
This paragraph shall identify those
components to be interchangeable and replaceable. Entries in this
paragraph are for the purpose of establishing a condition of design,
and are not to define the conditions of interchangeability that
are required by the assignment of a part number.
This paragraph shall specify requirements
to preclude or limit hazard to personnel and equipment. To the
extent practicable, these requirements shall be imposed by citing
established and recognized standards. Limiting safety characteristics
peculiar to the prime item due to hazards in assembly, disassembly,
test, transport, storage, operation and maintenance shall be stated
when covered neither by standard industrial or service practices
nor by a higher level specification. "Fail safe" and
emergency operating restrictions shall be included when applicable.
These shall include interlocks and emergency and standby circuits
require to either prevent injury or provide for recovery of the
prime item in the event of failure.
Human engineering requirements for
the prime item should be specified herein and applicable documents
(e.g., MIL-STD-1472) included by reference. This paragraph should
also specify any special or unique requirements, e.g., constraints
on allocation of functions to personnel and communications and
personnel/equipment interactions. Included should be those specific
areas, stations, or equipment which would require concentrated
human engineering attention due to the sensitivity of the operation
or criticality of the task, i.e., those areas where the effects
of human error would be particularly serious.
This paragraph shall specify the plan
for prime item documentation such as: specifications, drawings,
technical manuals, test plans and procedures, installation instruction
data in general terms.
Requirements for documenting the design
shall specify types of documents required for design review and
approval (establishment of the functional baseline of the item),
manufacture or procurement, testing, inspection installation,
operation, maintenance, and logistic support as appropriate.
This paragraph is not intended as a
requirement for procurement or delivery of data (DRL).
Were applicable, logistic considerations
and conditions that will apply to the system or configuration
item shall be specified in development specifications. Logistic
conditions such as maintenance considerations, modes of transportation,
supply system requirements, and impact on existing facilities
and equipment's shall be considered.
This paragraph shall include considerations
such as:
(a) use of multipurpose test equipment
(b) use of module vs. part replacement
(c) maintenance and repair cycles
(d) accessibility, and
(e) level of repairability by the Government
This paragraph shall specify the impact
of the prime item on the supply system and the influence of the
supply system on prime item design and use.
Considerations shall include:
(a) introduction of new components
in the supply system
(b) supply and resupply methods
(c) distribution and location of prime
item stocks.
This paragraph shall specify the impact
of the prime item on existing facilities and facility equipment.
It also shall specify requirements for new facilities or ancillary
equipment to support the prime item.
This paragraph shall specify personnel
requirements which must be integrated into the prime item design.
Requirements shall be specified in a positive sense, assuming
that the numbers and skill levels of personnel will be made available.
Requirements stated in this paragraph shall be the basis for ultimate
complete determination of item personnel training and training
equipment/facility requirements. It shall include but not limited
to: number and types of operational crew personnel for each deployment
mode and the intended duty cycles, both normal and emergency;
numbers and types of maintenance crew personnel for each operational
deployment mode and the intended duty cycle, both normal and emergency;
and types and total number of personnel which may be allocated
to the operation, maintenance, and control of the prime item.
It should describe in general qualitative terms the personnel
resources expected to be available for the scheduled beginning
of training on the item.
This paragraph shall consider:
a. Training requirements that will
be generated by new equipment to include, if possible, the concept
of how training should be accomplished, e.g., school. unit, or
contractor training.
b. Estimates of quantities of equipment
being developed that will be required solely for training purposes.
c. The need to develop associated training
devices, including types required. Prepare actual detailed statements
of requirements for characteristics of training devices.
d. Training time and locations available
for effective training programs.
This paragraph shall include a subparagraph
for each major component listed in paragraph 3.1.3. In stating
requirements for the various major components, it should be recognized
that verification may necessarily need be accomplished following
the delivery, installation, and checkout of the parts constituting
the major components. The functional relationship may be such
that verification of requirements specified for a major component
can only be accomplished when units, assemblies, or parts which
comprise the major component are assembled into the prime item.
For each major component, a separate paragraph shall be prepared
specifying the performance and physical characteristics.
This paragraph shall either specify
the order of precedence of requirements or assign weights to indicate
the relative importance of characteristics and other requirements.
It shall also establish the order of precedence of this specification
relative to referenced documents e.g., specification over drawings,
functional requirements over physical requirements, etc.
Requirements for formal tests/verifications
of prime item performance and design characteristics and operability
shall be specified in this paragraph. Tests/verifications specified
herein shall include prime item and component design evaluation
and operational capability verification. Subparagraphs under this
section shall include:
a. Reliability testing with respect
to prime item and component reliability. Requirements shall be
specified for collection and recording of data during all testing
which is to be part of the reliability analysis.
b. Engineering evaluation and test
requirements to the level of detail necessary to define the extent
of the test program and the objectives of the tests. The specific
elements to be included in the test shall be specified. If data
generated during the progress of tests specified herein is to
be recognized as formal verification that specified requirements
in Section 3 of the specification have been satisfied, the test
objectives shall so state.
c. Qualification testing of the prime
item and critical components.
d. Installation testing and checkout,
such as continuity checking, interface mating, major component
operation in the installed environment, support equipment compatibility,
and documentation verification.
e. Formal test verification of performance
characteristics to demonstrate that prime item requirements in
Section 3 of the specification have been satisfied.
This paragraph shall discuss the philosophy
of testing, location for performance of tests, and other information
related to testing not covered elsewhere. For software embedded
in firmware devices, the application of quality assurance provisions
or qualification requirements depends on whether the software
is designated as a CSCI or part of an HWCI. When the software
is designated as a CSCI, Qualification Requirements apply, but
when designated as part of a HWCI, Quality Assurance Provisions
apply.
Where applicable, the general test
and inspection philosophy shall be described with a statement
of responsibility for inspection, classification of examinations
and tests, sampling, lot formation, and other information pertinent
to the quality assurance provisions but not directly associated
with a specific test or examination.
For hardware, this section shall include
all of the examinations and tests (by reference where applicable)
to be performed in order to ascertain that the product, material
or process to be developed or offered for acceptance conforms
to the requirements in Sections 3 and 5 of the specification.
This paragraph shall assign responsibilities
for performance of tests to each agency, Government or contractor,
as applicable.
The concept of quality assurance places
primary responsibility for quality assurance of delivered products,
materials or services on the supplier who is responsible for offering
to the contracting agency only those products, materials or services
that conform to all specified requirements. Accordingly, the supplier's
responsibility for testing shall be clearly stated and the contracting
agency's role, either as a partner or monitor, shall be specified.
This paragraph is optional in a development
specification, and when used, would generally cover testing requirements
for qualification evaluation for selection of parts, components,
or equipment's to be used in the item.
This paragraph shall cover, or reference,
test and inspection requirements necessary to determine if all
requirements of Section 3 of the specification have been achieved.
Insofar as practical, tests shall be arranged in a logical order
for sequential performance.
Include here the verification matrix
which will provide for the correlation of Section 3 performance
requirements with Section 4 verification requirements. The CMP
provides an example verification cross-reference matrix (figure
14).
This section shall provide guidance
for the preparation of the prime item for delivery. Such guidance
will be particular to the prime item being specified and other
than standard practice. It shall include such non-standard practices
in appropriate configuration item descriptions. It may impose
requirements to comply with standard practices by referencing
appropriate military specifications, and standards.
All definitions, abbreviations and
acronyms contained in the Systems Engineering Management Plan
are applicable to this document, however for convenience a number
of them are repeated here.
Include in this section any general
information that aids in understanding this document; a number
of paragraphs can be written but as a minimum the next three shall
be included.
Include here information relative to
the use of the HWCI covered by this specification, e.g., "This
specification is to be used as the Hardware Allocated Baseline
for the (name of HWCI) HWCI for the ???? system."
Most of these definitions are taken
from the SEMP, if not their source is included.
- Acceptance Test -
Formal test conducted to determine whether or not a system satisfies
its acceptance criteria and to enable the customer to determine
whether or not to accept the system.
- Baseline -
A configuration identification document or a set of such documents
formally designed and fixed at a specific time during a configuration
item's life cycle. Baseline plus approved changes to those baselines,
constitute the current configuration identifications.
- Certification - A
process, which may be incremental, by which a contractor provides
evidence to the contracting agency that a product meets contractual
or otherwise specified requirements.
- Formal Testing -
The process of conducting testing activities and reporting results
in accordance with an approved test plan.
- Validation -
The process of evaluating software to ensure compliance with software
requirements during the first stages of the software development
life-cycle, and with system requirements during the System Integration
phase.
- Verification -
The process of determining whether or not the products of a given
phase of the software development life cycle fulfils requirements
established during the preceding phase.
- include here, in alphabetic order,
any other definition as necessary.
CDRL - Contract Data Requirement List
HWCI - Hardware Configuration Item
TBD - To be determined
- include here in alphabetic order
all the other abbreviations and acronyms used in this document
This section of the specification shall
contain requirements which are contractually a part of the specification
but which, for convenience in specification maintenance, are incorporated
herein, e.g., requirements of a temporary nature or for a limited
effectivity. Appendixes may be bound as separate documents for
convenience in handling, e.g., when only a few parameters of the
prime item are classified, an appendix containing only the classified
material may be established. Where parameters are placed in an
appendix, the paragraph of section 10 shall be referenced in the
main body of the prime item specification in the place where the
parameter would normally have been specified.
10 SCOPE
10.1 Identification.
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