Capacity Management Capacity Management

Goal – Primary Objective Capacity Management Goal – Primary Objective To understand: - The future business requirements (the required service delivery) - The organisation’s operation (the current delivery) - The IT infrastructure (the means of service delivery) Ensure that all current and future capacity and aspects of the business requirements are provided cost effectively

Why Capacity Management Monitor the performance and throughput of IT services Tuning activities to make efficient use of resources Understand the current demands for IT services and produce forecasts for future requirements Help to influence demands for IT resources Production of a Capacity Plan predicting the IT resources needed to achieve agreed or proposed service levels Capacity Management: Ensure IT Processing and Capacity provision match the evolving demands of the business Cost effectively and timely.

Success Factors Accurate business forecasts Capacity Management Success Factors Accurate business forecasts Understanding of current and future technology Ability to demonstrate cost effectiveness Interaction with other Service Management processes Ability to plan for and implement appropriate IT capacity to match business requirements and predictions

Responsibilities of Capacity Management Business Capacity management (BCM) - Ensuring future business requirements for IT services are considered and matched to capability Service Capacity Management (SCM) - Managing performance of IT services delivered to customers and documented in SLAs Resource Capacity management (RCM) - Management of components ensuring that all resources are monitored & measured See Figure 20 page 53. Service and Resource Capacity Management have overlapping activities BUT they have a different focus. Service: focuses on services that SUPPORT the business. Resource: focuses on technology that UNDERPINS all the service provision.

Business Capacity Management Planning Future Business requirements Requires a knowledge of….. Existing Service Levels, SLA’s Future service levels ans SLR’s Business Plan and Capacity Plan Modelling Techniques Analytical Simulation Trending Baselining Application Sizing

Service Capacity Management Monitors and Measures services Requires a knowledge of ….. Service Levels and SLA’s Service throughput and performance Tuning and demand management

Resource Capacity Management Management of Components of IT Infrastructure Requires a knowledge of ….. Current technology and utilisation Future alternative technologies Resilience of systems and services

Capacity Management Database (CDB) Forms the basis for the production of all Capacity management reporting May consist of many physical data stores covering: - Business data - Service data - Technical data - Financial data - Utilisation data May form part of the CMDB See Figure 21 page 55.

Iterative Activities – The Cycle Capacity Management Iterative Activities – The Cycle Monitor Implement Tune Analyse

Iterative Activities Iterative Activities – Inputs Tune Analyse Capacity Management Iterative Activities Iterative Activities – Inputs Monitor Implement Tune Analyse SLM Thresholds Resource Utilisation Thresholds Capacity Management DB

Iterative Activities Iterative Activities – Outputs Tune Analyse Capacity Management Iterative Activities Iterative Activities – Outputs Monitor Implement Tune Analyse Resource Utilisation Exception Reports SLM Exception Reports Capacity Management DB

Capacity planning is essentially a balancing act: Capacity Management Other Activities Demand Management – Differential Charging and Lock out Modelling - Trend Analysis, - Analytical Modelling - Simulation Modelling - Baseline Modelling Application Sizing Production of the Capacity Plan Capacity planning is essentially a balancing act: Cost against Capacity Supply against Demand

Benefits of Capacity Management Increased efficiently and cost savings resulting in more economic provision of IT services Elimination of unnecessary spare capacity Elimination of panic buying Possibility for deferred expenditure Reduced risk of performance Problems and failures More confident and improved forecasting Improved awareness of capacity issues within the development cycle Possible Problems page 57.

Exam Tips Business Capacity Management - future business requirements CM Exam Tips Business Capacity Management - future business requirements Service Capacity Management – current service delivery Resource Capacity Management – underlying resource components Demand Management – Differential Charging Modelling Tuning Analytical Simulation Baseline (what if?) Application sizing There are capacity threshold that generate alerts!

Capacity Management Exam Questions Application Sizing is a technique used by Capacity Management. Why is Application Sizing Important? A The availability of an IT service can be measured (AM) B The use of an IT application can be controlled C The maintenance of technical skills is important to application developers D The resources needed (RCM) for an application and its performance can be predicted (BCM)

Exam Questions Differential Charging is a technique used in ……….. Capacity Management Exam Questions Differential Charging is a technique used in ……….. A FTA (Fault Tree Analysis – ITSCM) B Status Accounting (Configuration Management) C Demand Management (Capacity Management – Varying Tariffs) D CRAMM (ITSCM – Risk Analysis)