Chapter 2: Managing Processes Flashcards

1
Q

Four basic process decisions

A
  • process structure
  • customer involvement
  • resource flexibility
  • capital intensity

Best understood at process or subprocess level, not firm level

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2
Q

Process structure

A

Process type relative to the kinds of resources needed, how resources are partitioned between them, and their key characteristics

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3
Q

Customer involvement

A

Ways in which customers become part of the process and to what extent

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4
Q

Resource flexibility

A

Ease with which employees and equipment can handle a wide variety of products, output levels, duties, and functions

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5
Q

Capital intensity

A

The mix of equipment and human skills in the process (higher cost of equipment relative to labor = higher capital intensity)

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6
Q

Process divergence

A

The extent to which the process is highly customized with considerable latitude for how it’s tasks are performed

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7
Q

Flexible flow

A

The customers, materials, or information moves in diverse ways, with the path of one customer or job often crisscrossing the path the next one takes.

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8
Q

Line flow

A

The customer, materials, or information moves linearly from one operation to the next according to a fixed sequence (standardized)

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9
Q

Front office process

A

High customer contact
Service provider interacts directly with customer
More flexible work flows
Considerable process divergence

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10
Q

Back office process

A

Low customer contact
Little service customization
Line flows

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11
Q

Elements of a product-process matrix

A

Volume
Product customization
Process characteristics (divergence and flow)

Generally higher customization = lower volume

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12
Q

Six sigma process improvement model

A

Define (scope and boundaries of process being analyzed)
Measure (specific metrics to determine what priorities are being met or missed)
Analyze (determine where there are gaps between actual and desired performance)
Improve (based on cost benefit analysis. Sets objectives for redesigned process)
Control

Also DMAIC process

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13
Q

Time study method of work measurement

A

Using a trained analyst to perform four basic steps in setting a time standard for a job or process
- selecting the work elements (or nested processes) within the process to be studied
- timing the elements
- determining the sample size
- setting the final standard

Has an allowance expressed as a percent of total normal time

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14
Q

Elemental standard data method

A

A database of standards compiled by a firm’s analysts for basic elements they they can draw on later to estimate the time required for a particular job.

Used when products or services are highly customized, job processes prevail, and process divergence is high

May include equations where time required is dependant on other elements of the job

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15
Q

Predetermined data method

A

Database approach that divides each work element into a series of micromotions that make up the element. The analyst then consults a published database that contains the normal times for the full array of micromotions

Best for highly repetitive processes

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16
Q

Learning curve analysis

A

Uses a line displaying the relationship between processing time and the cumulative quantity of a product or service produced

Shows how processing improves as operations learned

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17
Q

Process chart

A

An organized way of documenting all the activities performed by a person or group of people, at a workstation, with a customer, or on materials

Uses a table with information about each step in the process along with time estimates

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18
Q

Work measurement techniques

A
  • time study method
  • elemental standard data method
  • predetermined data method
  • work sampling method
  • learning curve analysis
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19
Q

Categories of activities in a typical process

A
  • operation (changes, creates or adds)
  • transportation
  • inspection
  • delay
  • storage
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20
Q

Annual labor cost

A

= time to perform process in hours x variable costs per hour x number of times process is performed per year

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21
Q

Checklist

A

A form used to record the frequency of occurrence of certain process failures

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22
Q

Process failure

A

Any performance shortfall (delay, error, waste, rework, etc …)

23
Q

Histogram

A

A summarization of data measured on a continuous scale showing the frequency distribution of some process failure (central tendency and dispersion of data)

24
Q

Bar chart

A

Series of bars representing the frequency of occurrence of data characteristics measured on a yes/no basis

25
Q

Pareto chart

A

A bar chart on which factors are plotted along the horizontal axis in decreasing order of frequency

Helps show which process problems need to be addressed first

26
Q

80-20 rule

A

Vilfredo Pareto

80% of an activity (particular issue) is caused by 20% of factors (individual potential causes of the issue)

Concentrating on these 20% can remove 80% of process failures

Pareto chart helps identify the 20% that cause most issues

27
Q

Uses for a Scatter diagram

A

Can be used to verify (or negate) the suspicion that two variables are related

28
Q

Cause and effect diagram

A

Relates a key performance problem to it’s potential causes

Aka fishbone diagram

Main performance gap = backbone

Major categories of potential causes = ribs (often use 6 Ms)

Under each potential category list all possible individual causes

List can then be investigated

29
Q

Six Ms

A

Major categories in operations
Management
Labor
Method
Measurement
Machine
Materials

30
Q

Process simulation

A

The act of reproducing the behavior of a process, using a model that describes each step

31
Q

Questions to ask about process steps

A
  • what is being done?
  • when is it being done?
  • who is doing it?
  • where is it being done?
  • how is it being done?
  • how well does it do on various metrics of importance?

Also
- why is the process being done?
- why is it being done where/how/when it is being done?

32
Q

Benchmarking

A

Systematic procedure that measures a firm’s processes, services, and products against those of industry leaders

33
Q

Competitive benchmarking

A

Comparisons against a direct industry competitior

34
Q

Functional benchmarking

A

Comparing areas such as admin, customer service, sales with those of outstanding firms in ANY industry who is exemplary in that area

35
Q

Internal benchmarking

A

Using an organizational unit with superior performance as a benchmark for other units

36
Q

key operational measures for processes

A

Flow time
Flow Rate
Inventory

37
Q

Little’s Law

A

Average inventory = average flow rate x average flow time

I = R * T
or in the book
L = lambda * W

manager may work on getting one measurement to a target by changing the other two

38
Q

process flow questions

A
  • how many flow units pass through the process per unit of time (flow rate)
  • how much time does a typical flow unit spend within process boundaries, including wait times (flow time)
  • how many flow units are within the process boundaries at any point in time (inventory)
39
Q

Flow rate

A

Also throughput rate
or lead time

number of units that flow through a specific point of the process per unit of time

when long run average inflow rate matches average outflow rate process is stable

denoted by R

40
Q

Flow time

A

average total time a flow unit takes to undergo processes within process boundaries PLUS total waiting time

Denoted by T

41
Q

Inventory

A

Number of flow units present within process boundaries

denoted by I

inventory = inventory from previous period + inventory accumulation rate

may also be looked at as work-in-process

42
Q

inventory accumulation rate

A

Input rate at time t - output rate at time t

43
Q

Using little’s law to find bottlenecks

A

calculate individual flow times for each section of a process to see which takes the longest

44
Q

using little’s law to evaluate financial statements

A

if process is turning a cost dollar into revenue

Inventory = inventory on balance sheet (dollar value of what is in process: estimated average)

Rate = Cost of goods sold (what was processed this year)

I/R = average flow time = average time cash was locked in inventory (multiply by 52 tog et weeks)

could also do
Rate (throughput) = net sales
Inventory = average accounts receivable
flow time *52 = average weeks from sale to collection

45
Q

inventory turns

A

aka turnover ratio

ration of throughput to average inventory = R/I aka 1/T

how many times the average inventory passes through the system. Higher flow time = fewer turns

46
Q

Theoretical flow time

A

the minimal amount of time required for processing a typical flow unit, without any waiting (always the longest flow path)

can be measured directly via process flow charts which aggregate the time taken by the individual activities representented

47
Q

minimizing working capital

A

less working capital = lower costs

reducing inventory in the system reduces flow time and reduces working capital

48
Q

considerations for defining the flow unit

A
  • looking at product or entire mix? What is included and excluded?
  • what are the process boundaries? When does the flow unit leave the process?
49
Q

“Three Ms”

A

Method
Man (Labor)
Machine

50
Q

Process flow charts

A

Illustrate the sequential or parallel activities that take a process from start to finish

  • identify the different steps
  • identify the time each step takes
  • identify the average number of visits (tries to get each step right)
  • work content = time x number of visits

can calculate flow time on each path to see if they’re in sync or if there is waiting time

triangle buffers in between steps indicate waiting time (non-value added activities)

51
Q

Total flow time

A

Longest path on a process flow chart

aka critical path

may change once waiting times are taken into consideration
(includes processing time + time spent in buffers)

52
Q

flow time efficiency

A

theoretical flow time / average flow time

53
Q

levers to reduce theoretical flow time

A
  • reduce the work content of critical activities (work smarter, faster, do it right the first time, change the product mix)
  • move work off the critical path (options for prefabrication/ outsourcing)
  • reduce wait time