Research literature review is a critical phase in project management research, providing the theoretical foundation that guides inquiry and practice. For project managers in Kenya, reviewing relevant theories enables a deeper understanding of project dynamics and informs decision-making processes tailored to local contexts such as public sector projects or private sector infrastructure developments. This chapter explores the main theories that underpin project management studies, highlighting their relevance and application within Kenyan projects. Understanding these theories equips professionals to critically analyze project challenges and implement evidence-based solutions.

2.1 Relevant Theories of the Study

Theories in project management research provide conceptual frameworks that explain how projects are initiated, planned, executed, and controlled. They help researchers and practitioners understand relationships between variables such as stakeholder engagement, resource allocation, and risk management. In the Kenyan context, where projects often face unique socio-economic and regulatory challenges, adopting appropriate theories enriches the quality of research and enhances project outcomes.

2.1.1 Theories Explaining Project Success and Failure

Project success and failure theories seek to identify factors that determine whether a project meets its objectives within scope, time, and budget constraints. These theories are essential for Kenyan project managers who must navigate complex environments including political influence, funding fluctuations, and community expectations.

Key Theories Explaining Project Success

• Iron Triangle Theory: This theory emphasizes the balance of scope, time, and cost as the primary determinants of project success. Projects that deliver on these three constraints are deemed successful, although quality and stakeholder satisfaction are increasingly recognized as critical factors.
• Stakeholder Theory: Recognizes that project success depends on satisfying the needs and expectations of all stakeholders, including clients, suppliers, government agencies, and local communities. For example, a county government road construction project must engage residents to reduce resistance and ensure smooth implementation.
• Contingency Theory: Suggests that project success depends on adapting management style and processes to the specific context and environment. Kenyan projects often require flexible approaches due to variable regulatory and cultural settings.
• Resource-Based View: Focuses on the strategic use of internal resources and capabilities to achieve project goals. A SACCO implementing a new IT system would leverage its skilled workforce and technology infrastructure for success.
• Project Life Cycle Theory: Defines success through the completion of project phases, initiation, planning, execution, monitoring, and closure, each with specific deliverables that cumulatively determine success.

Theories Addressing Project Failure

• Chaos Theory: Proposes that projects are complex and unpredictable, where small changes can lead to significant impacts, explaining why some projects fail unexpectedly. This is relevant in volatile sectors such as construction in Nairobi.
• Risk Management Theory: Highlights that inadequate identification and mitigation of risks often lead to failure. For instance, a hotel development project in Mombasa may fail if environmental risks such as flooding are not managed.
• Communication Theory: Attributes failure to poor communication among project teams and stakeholders, a common issue in large county government projects involving multiple departments.
• Theory of Constraints: Points to bottlenecks in resources or processes as primary causes of delay and failure.
• Expectation Theory: Failure arises when stakeholder expectations are misaligned with project deliverables, common in donor-funded agricultural projects.

2.1.2 Theories of Project Planning and Control

Planning and control theories provide frameworks for organizing project activities, allocating resources, and monitoring progress to ensure objectives are met. These theories support Kenyan project managers in handling complex logistical and operational challenges.

Planning Theories

• Critical Path Method (CPM): A scheduling technique that identifies the longest sequence of dependent tasks to determine the shortest project duration. It helps project managers in insurance firms plan claim processing system upgrades efficiently.
• Program Evaluation and Review Technique (PERT): Uses probabilistic time estimates to manage uncertainty in project schedules, useful in research projects at universities.
• Work Breakdown Structure (WBS) Theory: Advocates decomposing projects into smaller, manageable components, facilitating detailed planning and cost estimation.
• Goal Setting Theory: Emphasizes the importance of clear, measurable objectives to guide planning and motivate teams.
• Systems Theory: Views projects as interconnected components within a larger organizational system, stressing coordination and integration during planning.

Control Theories

• Earned Value Management (EVM): Integrates scope, schedule, and cost parameters to assess project performance and forecast outcomes.
• Feedback Control Theory: Uses continuous monitoring and feedback loops to adjust project activities, applicable in dynamic environments like retail business expansions.
• Theory of Delegation: Stresses the importance of assigning authority and responsibility to ensure effective control.
• Variance Analysis: Identifies deviations from plans, enabling corrective actions.
• Agency Theory: Addresses conflicts between project owners and managers, emphasizing control mechanisms to align interests.

2.1.3 Behavioral and Organizational Theories in Project Management

Project management is not only technical but also deeply influenced by human behavior and organizational culture. These theories explain interactions, motivation, leadership, and decision-making within project teams.

Behavioral Theories

• Maslow’s Hierarchy of Needs: Suggests that project team members’ motivation depends on fulfilling needs from basic physiological to self-actualization, guiding human resource practices in Nairobi hospitals managing project staff.
• Herzberg’s Two-Factor Theory: Differentiates between hygiene factors that prevent dissatisfaction and motivators that enhance satisfaction, impacting team morale in cooperative societies.
• Equity Theory: Focuses on fairness and justice perceptions among team members, crucial in multi-stakeholder projects like county water supply schemes.
• Expectancy Theory: Posits that motivation is based on expected outcomes, influencing incentive design in banking sector projects.
• Theory X and Theory Y: Contrasts authoritarian and participative management styles affecting leadership effectiveness.

Organizational Theories

• Contingency Theory (Organizational): Highlights that organizational structure and processes must fit the project environment for effectiveness.
• Institutional Theory: Explains how external pressures such as regulations and norms shape project management practices.
• Resource Dependence Theory: Focuses on managing dependencies on external resources and stakeholders.
• Social Network Theory: Analyzes relationships and communication flows within project teams and external partners.
• Cultural Dimensions Theory: Examines how national and organizational culture impact project behaviors and outcomes.

2.1.4 Theories of Innovation and Change in Project Management

Innovation and change management theories are vital for projects that introduce new technologies, processes, or organizational transformations. Kenyan project managers leading ICT or infrastructure projects benefit from understanding these theories.

Innovation Theories

• Diffusion of Innovations Theory: Describes how new ideas spread through social systems, relevant to adoption of mobile payment systems by Kenyan SACCOs.
• Disruptive Innovation Theory: Explains how innovations can create new markets by displacing established technologies.
• Open Innovation Theory: Advocates leveraging external and internal ideas for project success.
• Technology Acceptance Model (TAM): Predicts user acceptance of new technologies, guiding training and deployment strategies.
• Absorptive Capacity Theory: Focuses on a project team's ability to recognize, assimilate, and apply new knowledge.

Change Management Theories

• Lewin’s Change Model: Outlines unfreezing, changing, and refreezing stages for successful change implementation.
• Kotter’s 8-Step Change Model: Provides detailed steps for leading organizational change, applicable in public sector reforms.
• ADKAR Model: Focuses on individual change elements: awareness, desire, knowledge, ability, and reinforcement.
• Bridges’ Transition Model: Differentiates between change (external) and transition (internal psychological process).
• McKinsey 7-S Model: Emphasizes alignment of seven organizational elements during change initiatives.

Chapter Summary

This chapter explored the critical process of reviewing research literature within a study. It began by examining relevant theories that underpin the research, highlighting their role in providing a foundational understanding and guiding the investigation. The empirical literature review was then discussed, focusing on analyzing previous studies and their findings to establish the current state of knowledge on the topic. Attention was given to the development of the conceptual framework, which organizes key concepts and illustrates the relationships between them to support the research design. The chapter concluded with an exploration of research gaps, identifying areas where existing studies are insufficient or incomplete, thereby justifying the need for the current research. Through these components, the chapter emphasized the importance of a thorough literature review in shaping a robust and meaningful research study.