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Questions and Answers

What is a characteristic of the capacity lead strategy in capacity expansion?

  • It waits for demand to increase before expanding capacity.
  • It increases capacity ahead of expected demand. (correct)
  • It only expands capacity in small increments.
  • It focuses solely on reducing costs during expansion.

Which strategy involves expanding capacity in a single step rather than in increments?

  • One-step expansion strategy (correct)
  • Incremental expansion strategy
  • Capacity lead strategy
  • Capacity lag strategy

In the context of Material Requirements Planning (MRP), what is primarily focused on?

  • Forecasting long-term market trends
  • Determining what materials are needed and when (correct)
  • Optimizing team management skills
  • Identifying financial constraints in production

What encompasses the main inputs of MRP?

<p>Inventory levels, bill of materials, and master schedule (B)</p> Signup and view all the answers

Which scheduling sequencing rule is predominantly utilized in MRP?

<p>First in, first out (FIFO) (D)</p> Signup and view all the answers

What layout is best suited for operations where resources are grouped based on similar processes?

<p>Process layout (D)</p> Signup and view all the answers

Which facility layout would be utilized for products that are too large to move easily?

<p>Fixed-position layout (A)</p> Signup and view all the answers

In which type of layout are resources arranged in sequence along assembly lines?

<p>Product layout (C)</p> Signup and view all the answers

What is the primary characteristic of a cell layout?

<p>It groups products based on similar requirements. (A)</p> Signup and view all the answers

Which layout allocates space in accordance with customer behavior?

<p>Retail layout (C)</p> Signup and view all the answers

What is safety stock primarily used for?

<p>To protect against demand/supply variability during lead time (D)</p> Signup and view all the answers

Which method incorporates both demand behavior and the probability of stockouts?

<p>Service level method (C)</p> Signup and view all the answers

What is the primary goal of managing safety stock?

<p>Minimizing shortage costs (D)</p> Signup and view all the answers

Which of the following statements about the EOQ model is true?

<p>It only focuses on anticipation inventory. (A)</p> Signup and view all the answers

Which formula is likely to be utilized in forecasting?

<p>Forecast error measures (B)</p> Signup and view all the answers

What term describes the probability that the inventory available during lead time will meet demand?

<p>Service level (C)</p> Signup and view all the answers

What is a potential downside of using a simplistic method of calculating safety stock?

<p>It neglects actual demand variability. (D)</p> Signup and view all the answers

What factor does the service level method explicitly account for?

<p>Demand behavior (C)</p> Signup and view all the answers

What is meant by a carbon footprint?

<p>The amount of carbon dioxide produced by your lifestyle. (C)</p> Signup and view all the answers

Which of the following best describes renewable energy?

<p>Electricity from replenishable sources. (C)</p> Signup and view all the answers

What does greenwashing refer to?

<p>Promoting products as environmentally friendly when they are not. (D)</p> Signup and view all the answers

Which of the following actions would most directly reduce carbon emissions in supply chains?

<p>Optimizing delivery routes to minimize travel distance. (D)</p> Signup and view all the answers

What is one significant benefit of supply chain improvement?

<p>Lower total costs. (B)</p> Signup and view all the answers

Which option illustrates an eco-friendly action?

<p>Designing packaging that eliminates waste. (A)</p> Signup and view all the answers

What does the term compostable mean?

<p>Breaks down naturally within a specific time frame. (B)</p> Signup and view all the answers

Which of the following practices contributes to reducing plastic waste?

<p>Using refillable packaging for products. (C)</p> Signup and view all the answers

What is the primary assumption made in time series forecasting?

<p>Past demand patterns can be indicative of future demand. (C)</p> Signup and view all the answers

What kind of demand behavior reflects a consistent, predictable pattern over time?

<p>Seasonality (B)</p> Signup and view all the answers

Which of the following best describes 'random variation' in demand forecasting?

<p>Unpredictable changes in demand that cannot be anticipated. (C)</p> Signup and view all the answers

When should a new model be selected in the forecasting process?

<p>When the forecast accuracy is not acceptable. (B)</p> Signup and view all the answers

What type of demand behavior is characterized by a general rise or fall over a significant period?

<p>Trend (C)</p> Signup and view all the answers

What should be included to enhance forecasting accuracy?

<p>Qualitative information when relevant. (C)</p> Signup and view all the answers

Which of the following is NOT a component of time series forecasting?

<p>Request for future orders (C)</p> Signup and view all the answers

What happens after a forecast is computed in the forecasting process?

<p>The forecast results are monitored continuously. (A)</p> Signup and view all the answers

What is the primary characteristic of the Naïve forecasting model?

<p>It uses the actual demand from the current period only. (A)</p> Signup and view all the answers

Which formula correctly represents the Simple Moving Average forecasting method?

<p>Ft+1 = (Dt + Dt–1 + Dt–2) / 3 (A)</p> Signup and view all the answers

What does the term 'N' represent in the Simple Moving Average formula?

<p>Total number of demand periods used in calculation. (A)</p> Signup and view all the answers

What is a key advantage of using a Weighted Moving Average over a Simple Moving Average?

<p>It allows for varying influences of past demands. (C)</p> Signup and view all the answers

In the Weighted Moving Average, how do the weights typically behave?

<p>They reflect the influence of recent demands with the most current having the highest weight. (A)</p> Signup and view all the answers

Which statement best describes the effect of using a moving average model in the presence of seasonal demand variations?

<p>It may smooth out seasonal variations making them less detectable. (D)</p> Signup and view all the answers

What would be a good scenario to apply the Naïve forecasting model?

<p>When historical data is not available. (A)</p> Signup and view all the answers

What characteristic makes the Naïve forecasting model susceptible to changes in demand?

<p>It absolutely relies on the current period's demand. (B)</p> Signup and view all the answers

Flashcards

Carbon emissions

Pollution released into the atmosphere from carbon dioxide and carbon monoxide, often produced by motor vehicles.

Carbon footprint

The amount of carbon dioxide produced by your lifestyle.

Climate change

Significant change in temperature, precipitation, or wind patterns over an extended period.

Eco-friendly

Environmentally minded actions causing minimal harm to the Earth.

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Inventory management

Controlling and managing the stock of goods in a supply chain.

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Supply chain improvement benefits

Lower inventory, shorter cycle time, lower total costs, higher service levels, and stronger relationships with supply chain members.

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Renewable energy

Electricity from replenishable sources such as geothermal, hydropower, solar, and wind.

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Greenwashing

Misrepresenting something as environmentally sound, when it's not.

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Safety Stock

Extra inventory held to buffer against uncertainties in demand or lead time.

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What does safety stock aim to minimize?

Safety stock primarily aims to minimize shortage costs, which occur when demand exceeds available inventory.

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Percentage Method

A simple method to calculate safety stock by taking a percentage of annual demand.

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Service Level Method

A more sophisticated method to calculate safety stock by considering demand behavior and the probability of a stockout.

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Service Level

The probability that the available inventory during the lead time will meet demand.

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Reorder Point

The inventory level at which a new order is placed to replenish stock.

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Lead Time

The time it takes from placing an order to receiving the goods.

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Average Demand During Lead Time

The average amount of product demanded during the lead time.

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Time Series Forecasting

A method that uses historical data to predict future demand, assuming past demand is a good predictor of future demand.

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Time Series Components

Factors that influence demand over time, including average demand, trend, seasonality, cycle, and random variation.

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Average Demand

The stable level of demand over time, without considering any fluctuations.

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Trend

A general increase or decrease in average demand over time, reflecting long-term growth or decline.

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Seasonality

Short-term periodic fluctuations in demand due to specific time periods like days of the week, months, or seasons.

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Cycle

Long-term periodic fluctuations in demand driven by factors like product life cycles or economic cycles.

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Random Variation

Unpredictable fluctuations in demand that cannot be explained by other factors.

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Forecast Accuracy

How closely forecasts align with actual demand, measured by metrics like mean absolute deviation (MAD) or mean squared error (MSE).

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Naïve Model

A simple forecasting method that uses the most recent demand value as the forecast for the next period.

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Simple Moving Average

A forecasting method that calculates the average of past demand values over a specified period to predict future demand.

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Weighted Moving Average

A forecasting method that assigns weights to recent demand values, giving more importance to the most recent data points.

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Exponential Smoothing

A forecasting method that uses a smoothing constant to weigh past forecasts and current demand values to produce new forecasts.

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Seasonality Adjustment

A technique used to account for predictable patterns or cycles in demand that occur at regular intervals.

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What does the 'N' represent in a Simple Moving Average?

'N' represents the number of periods used in the calculation of the moving average. It determines how many past demand values are included in the average.

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What are the weights in a Weighted Moving Average?

Weights are values assigned to each past demand value to reflect their relative importance in the forecast. They are non-negative and sum to 1.

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Why is it important to adjust for seasonality?

Seasonality adjustments help improve forecast accuracy by accounting for predictable patterns in demand that occur at regular intervals, such as holidays or weather changes.

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Capacity Lead Strategy

A strategy where capacity is increased before demand increases. This proactive approach helps avoid potential shortages and delays.

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Capacity Lag Strategy

A strategy where capacity is increased after demand increases. This reactive approach can lead to delays and lost sales, but it helps minimize wasted resources.

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One-Step Expansion Strategy

A strategy where capacity is increased significantly in one large increment. This approach can be cost-effective, but it may lead to excess capacity during periods of low demand.

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Incremental Expansion Strategy

A strategy where capacity is increased gradually in smaller increments. This approach allows for flexibility and avoids overinvestment, but it may require more frequent adjustments.

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What is MRP?

Material Requirements Planning (MRP) is a system used to plan and manage the production and procurement of materials based on demand forecasts. It helps ensure that the right materials are available at the right time.

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Process layout

Groups resources based on similar processes, suitable for intermittent operations. Example: A hospital with radiology, laboratory, and surgery rooms.

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Product layout

Groups resources based on the sequence of production steps for a specific product. Example: Assembly line for cars.

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Cell layout

Combines elements of process and product layouts, grouping resources by similar product requirements. Example: A team of workers building different models of the SAME product.

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Fixed-position layout

Used when the product is too large to move, resources are brought to the product's location. Example: Construction of a bridge.

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Retail layout

Organizes space based on customer flow patterns to optimize product visibility and shopping experience.

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Study Notes

MOS 3330 Course Overview

  • The course covers topics including introduction, supply chain management, inventory management, forecasting, aggregate planning, material requirements planning, enterprise resource planning, process and product design, Just-In-Time systems, quality, statistical process control, and total quality management.
  • There are assessments throughout the course including Test 1, Test 2, and a final exam. Formula sheets are provided with tests.
  • The course will cover aspects of operations management, with learning objectives focused on definitions, the importance of OM, the difference between goods and services, and overall trends.

Introduction to Operations Management

  • Learning Objectives cover 4 points:
    • What is Operations Management (OM)?
    • Why study OM?
    • Goods vs. Services
    • Trends in OM
  • OM is the transformation of inputs into finished goods and services. Inputs include raw materials, supplies, employee skills, facilities, capital, and equipment. Outputs are finished goods and services.
  • OM includes various operations like manufacturing, deliveries, retail, health care, entertainment, and education.
  • Operations management is crucial to all organizations.

Supply Chain Management

  • Learning Objectives cover 5 points:
    • Supply chains
    • Supply chain related subjects
    • Bullwhip effect
    • Supply chain strategies
    • Supplier relationships
  • Supply chain: a network of facilities, functions, and activities involved in producing and delivering products or services from suppliers to customers.
  • Supply chain management coordinates the movement of goods and controls the information in the supply chain, including sales data, sales forecasts, promotions, and inventory levels.

Logistics

  • Shipping and delivery: Transportation cost, mode, lead time, and traffic management play a role. Highway, rail/water, pipelines, air are different modes.
  • Distribution management is also part of logistics.
  • Facility location, proximity to customers, business climate, labor quality, infrastructure, positioning of inventory (where/how many to hold?) and 3PL (third-party logistics) are key concerns.
  • Other logistics concerns include international businesses and outsourcing freight consolidation and distribution activities.

Purchasing

  • The purchasing cycle consists of:
    1. Receiving requisitions
    2. Selecting suppliers
    3. Placing orders with vendors
    4. Monitoring orders
    5. Receiving orders
  • Purchasing involves coordinating with other teams (accounting, engineering, legal).

Sourcing

  • Selecting suppliers based on price, quality, services, location, and flexibility.
  • Supplier selection strategies include single sourcing for better relationships and frequent deliveries; or multiple suppliers to spread risk.
  • These approaches are contrasted with factors like volume flexibility, and high ordering costs.

Bullwhip Effect

  • The distortion of information along the supply chain, where customer demand gets increasingly distorted as it moves through the supply chain towards suppliers.
  • Contributing factors include batch ordering, costs, return policies, promotions, pricing that leads to forward buying, a lack of visibility of end demand, inaccurate forecasting, and long lead times.

Inventory Management

  • Learning Objectives:
    • Purposes of inventory
    • Inventory control systems
    • Inventory costs
    • EOQ models
    • Safety stock
  • Inventory: A stock of items or materials held to satisfy eventual demand
  • Raw materials, purchased parts and supplies
  • Work-in-process (partially completed) products
  • Finished goods
  • Rework items
  • Tools, machinery, and equipment
  • Labor

Forecasting

  • Learning Objectives:
    • Qualitative vs. quantitative methods
    • Forecasting process
    • Time series methods
    • Forecast error measures
  • Forecasting predicts the future from past experience and current events.
  • Forecasting in OM includes strategic planning of markets and product demand for long-range, mid-range, and short-range applications.

Enterprise Resource Planning (ERP)

  • Learning Objectives:
    • What is ERP
    • Historical development of ERP
    • ERP enablers, and implementation issues
    • Project management basics
  • ERP software integrates modules to control and coordinate business processes within an entire enterprise, including manufacturing information systems as its origin. Historical contexts and enablers include various eras, including MRP, MRP + CRP, MRP II, and finally ERP. Implementation issues include technical challenges with handling large data sets, data integrity, training, and behavioral issues including support from management and employee buy-in.

Process and Product Design

  • Learning Objectives:
    • Process types
    • Facility layout types
    • Manufacturing technology, and product design basics
  • Process: How to transform input into output.
  • Types of product flow and approaches to orders. Product volumes and standardization.

Just-In-Time (JIT) Systems

  • Learning Objectives:
    • JIT origin and philosophy
    • JIT key elements
    • Implementation issues, and job design basics
  • JIT aims to eliminate waste and produce products when needed to minimize inventory and other wasteful processes. Key elements include work cells, pull manufacturing systems, and the kanban system to improve flow coordination.

Quality

  • Learning Objectives:
    • What is quality
    • Quality measures
    • Costs of quality
    • Process improvement
    • Continuous improvement
  • Quality: The totality of features and characteristics that satisfy needs. Quality is a measure of conformance to specifications and fitness for use, and the perspective is varied, between producer and consumer. Measures include output, yield, costs associated, and other indices.
  • Quality improvement and tools include process improvement, continuous improvement, Six Sigma, and related awards and standards. Processes and techniques such as those used in statistical process control (SPC) are part of quality improvement process, and useful for measuring and controlling quality.

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