NZQA Expiring unit standard
6725 version 5
Page 1 of 3
Title
Demonstrate an understanding of computer database design
Level
6
Credits
7
Purpose
People credited with this unit standard are able to: explain data
management issues; compare database architectures;
investigate the features of commercial database management
systems; discuss the impact of emerging information systems
architectures on database design; and produce a logical and
physical database design for a data structure. The
performance of all outcomes is to a standard that allows for
further learning in this area.
Classification
Computing > Computer Operations
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Open. The credit value of this unit standard is calculated
assuming a person has the prior knowledge and skills to
demonstrate an understanding of database management
systems.
Explanatory notes
This unit standard is
expiring
Outcomes and evidence requirements
A data requirements specification for a realistic data structure must be provided to the
person being assessed against this unit standard.
Outcome 1
Explain data management issues.
Range
access, shared use, security, integrity, privacy, reliability, risk, performance,
integration, data administration.
Evidence requirements
1.1
The explanation outlines the business impact of the issues.
1.2
The explanation identifies the strengths and weaknesses of the ways database
management systems address the issues.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
6725 version 5
Page 2 of 3
Outcome 2
Compare database architectures.
Range
hierarchical, network, relational, object oriented, hybrid models.
Evidence requirements
2.1
The comparison distinguishes architectures.
2.2
Decisions on which architecture to use for given situations are justified by
describing the advantages and disadvantages of each architecture.
Outcome 3
Investigate the features of commercial database management systems.
Range
at least two systems; features – data access tools, recovery, audit, distributed
data management, backup, transaction processing.
Evidence requirements
3.1
A comparison of features identifies the similarities and differences between
systems.
3.2
The investigation identifies the implications for physical database design.
3.3
The investigation identifies the implications for data management.
Outcome 4
Discuss the impact of emerging information systems architectures on database design.
This unit standard is
The discussion identifies factors that affect database design decisions.
expiring
Evidence requirements
4.1
4.2
The discussion suggests database design strategies for addressing the effects
of emerging information systems architectures.
Outcome 5
Produce a logical and physical design for a data structure.
Evidence requirements
5.1
The designs fulfil the specified data requirements.
5.2
The physical design is consistent with the logical design.
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
6725 version 5
Page 3 of 3
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
8 July 1996
31 December 2015
Revision
2
28 November 2000
31 December 2015
Review
3
17 October 2008
31 December 2015
Rollover
4
21 July 2011
31 December 2015
Rollover
5
16 April 2015
31 December 2017
Consent and Moderation Requirements (CMR) reference
0011
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
This unit standard is
expiring
NZQA National Qualifications Services
SSB Code 130301
 New Zealand Qualifications Authority 2016