1. Korea University Dept.of Industrial System & Information Engineering User Interface Lab Performance by Design Ch.5 _ Designing for control : Understanding Success and How IT Is Unique 김인수, 남택수, 이선정

2. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 2 Key variance control analysis To see “ how conventional ways often inappropriate” because of the difficulty of communicating among group Introduction

3. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 3 Understanding the market Niche: why our system is unique - Key variance are unique to each system, just as the out put from system are unique in the market -Product 와 purpose 사이의 연결은 technical goal 과 objective goal  short term statements of expected results objective  longer term performance expectation - Key variance 는 technical goal 과 objectives 로 정의되고 시스템의 Purpose 를 추구하는 output features 를 반영 해야 한다

4. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 4 Understanding the market Niche: why our system is unique ▶ Focus on product and purpose -STS analysis methodology analysis has the advantage of defining technology in term of its input, and product ex) chemical plant terminology “ the steam plant”  sulfur section -Fewer unit operation for their system ex) chemical plant narrow their operation down to five

5. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 5 Understanding the market Niche: why our system is unique ▶ Identifying Key variance -Most Important in their impact on quantity, Quality,or costs of their unique system output  table 5.1 matrix

6. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 6 Controlling Key Variance -Key variance control is focused on the control of IT rather than control of people -Technical system performance  “ how well key variance are controlled within the system” ▶ The Methodology of Variance Control Analysis -The key variance identified for a system must be examine to determine the manner -Use of a Table of variance Control

7. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 7 Controlling Key Variance ▶ A Process Manufacturing Example of key variance Control Ex) variance 5 _ cheese making key variance  to eliminate any possibility of food poisoning  table 5.3 variance control table ▶ A White –collar Example of key variance Control Ex) variance 4 _ pension claim  table 5.4 variance control table

8. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 8

9. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 9

10. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 10 Managing In the VOID A void is the absence of anything - in management term a void is any unknown situation Key variance provide all member of a system with a common language of work Average employees who are aware of key variance in Their process and are trained to control them effectively also become central performers in world class operation

11. Korea University Dept.of Industrial System & Information Engineering User Interface Lab View page 11 Resolving Paradox : The New Management Skill purposeful organizations become more complex  decision makers 는 dilemma 에 직면 EX) AT & T Variance Control and The STS Paradigm Variance control actually form a bridge between the technical and social analysis  central to the design process