The adoption of radical and incremental innovations: an empirical analysis
Management Science
Firm size and the information technology investment intensity of life insurers
MIS Quarterly - Special issue on the strategic use of information systems
The productivity paradox of information technology
Communications of the ACM
The grassroots of IT and strategy
Strategic information systems
A decision support system for electric utilities: compliance with Clean Air Act
Decision Support Systems
Information systems planning in a turbulent environment
European Journal of Information Systems
A model of computerization of manufacturing systems: an international study
Information and Management
The practice of IS/IT benefits management in large Australian organizations
Information and Management
A process for post-implementation IT benchmarking
Information and Management
An Overview of Leading Current Legal Issues Affecting Information Technology Professionals
Information Systems Frontiers
The impact of industry contextual factors on IT focus and the use of IT for competitive advantage
Information and Management
The Sarbanes-Oxley Act: implications for large-scale IT outsourcing
Communications of the ACM - Emergency response information systems: emerging trends and technologies
Strategic information systems planning: A case study from the financial services industry
The Journal of Strategic Information Systems
Unintended invitation: organizational wi-fi use by external roaming users
Communications of the ACM
The Journal of Strategic Information Systems
SOX, compliance, and power relationships
Communications of the ACM - ACM's plan to go online first
The Journal of Strategic Information Systems
The Journal of Strategic Information Systems
IS Strategic Planning for Operational Efficiency
Information Systems Management
Business systems planning and business Information control study: a comparison
IBM Systems Journal
Experiences in strategic information systems planning
MIS Quarterly
A contingency model for estimating success of strategic information systems planning
Information and Management
Diversity and diffusion of theories, models, and theoretical constructs in egovernment research
EGOV'11 Proceedings of the 10th IFIP WG 8.5 international conference on Electronic government
Reflecting on E-Government Research: Toward a Taxonomy of Theories and Theoretical Constructs
International Journal of Electronic Government Research
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Mandatory information system (IS) investments occur when government regulations require firms to alter their IS. These investments are additional expenditures added onto the initial expenditures of non-mandatory IS investments. Managers are concerned about associated costs and in an attempt to reduce the expenditures, most firms refrain from formal planning methods when mandatory investments are imposed upon them. Drawing on Henderson's and Sifonis' (1988) IS Planning and Investment Model as our theoretical lens, this paper argues that firms should re-consider this practice. It is hypothesised that formal planning methods are beneficial because they enable firms to combine mandatory and non-mandatory investments in such a way that competitive advantage can be achieved. We use a secondary dataset provided by the Australian government to test the hypotheses. Results show that only two out of three investigated formal planning methods are positively associated with competitive advantage. We conclude that in the special case of mandatory investments, formal methods are only beneficial if they incorporate information from the entire firm, rather than information from particular departments only.