effects of equipment failure uncertainty in batch

Leave Comment

Effects of equipment failure uncertainty in batch ...

11-06-1995  Uncertainty analysis is incorporated at the production scheduling stage to improve the probability of performing the resulting schedule. This probability will depend on forecasts of equipment failure. The effects of equipment failure on the production schedule are minimised by means of reliability indexes for each plant unit.

Get price

Effects of equipment failure uncertainty in batch ...

This paper deals with production scheduling of multipurpose batch plants in the presence of equipment failure uncertainty. Uncertainty analysis is incorporated at the production scheduling stage to improve the probability of performing the resulting schedule. This probability will depend on forecasts of equipment failure. The effects of equipment failure on the production schedule are ...

Get price

Batch production and preventive maintenance scheduling ...

24-07-1997  The precedence relationships between tasks is established through their corresponding states: TS,= TF,.,, + TWi,t Vl, iETLt, i'ETLil:Isls~Siand s~Sc (2) The waiting time of a task (TW,) is bounded by the Batch scheduling with equipment failure uncertainty stability of the intermediate products (states) it gen- erates: .,~ max TW.--TW~ VI, i~TLI, s~Si (3) Equipment units assignment

Get price

Managing Process Risk through Application of FMEA to Batch ...

Failure Effects The consequences if the failure occurs Risk Priority RPN = ... 2 equipment failure 2 PM Program 2 8 (mixer problem) ... mapped to 25 critical failure modes... 8 Purification Batch Records Analyzed >2600 Batch Record line items 266 High Risk RPN Steps

Get price

5 Causes of Equipment Failure and How to Avoid Them Fiix

26-06-2019  5 common causes of equipment failure. Cause #1: Improper operation. Cause #2: Failure to perform preventive maintenance. Cause #3: Too much preventive maintenance. Cause #4: Failure to continuously monitor equipment. Cause #5: Bad (or no!) reliability culture. The bottom line. Equipment failure happens. The impact of it can run the gamut from ...

Get price

Batch production and preventive maintenance scheduling ...

This paper deals with production scheduling of multipurpose batch plants in the presence of equipment failure uncertainty. Uncertainty analysis is incorporated at the production scheduling stage to improve the probability of performing the resulting schedule. So, the need of complete rescheduling of the production plan is reduced and more effective reactive scheduling strategies can be applied ...

Get price

The Consequences of Equipment Failure - Facilities ...

13-02-2013  The Consequences of Equipment Failure. By Andrew Gager Maintenance Operations. OTHER PARTS OF THIS ARTICLE Pt. 1: Repair or replace? Best Strategies to Reduce Maintenance Costs Pt. 2: This Page Pt. 3: Lifetime Operation of Motor Costs More than Initial Purchase. If a manager decides to defer needed repairs or replacement, what is the impact ...

Get price

Uncertainty in process design and operations - ScienceDirect

11-06-1995  I sS st s/ ,,s/ sjsSS - desl~ 1 I I I I I I I II /deign 2 i i : i 10.00 15.00 20.00 25.00 Demand Figure 2: Value of Perfect Information BATCH PLANT DESIGN AND OPERATIONS UNDER UNCERTAINTY For the case of batch plant design involving uncertainty in process parameters (size factors' pro- cessing times) and product demands, and by employing the discrete equipment sizes

Get price

Batch production and preventive maintenance scheduling ...

This paper deals with production scheduling of multipurpose batch plants in the presence of equipment failure uncertainty. Uncertainty analysis is incorporated at the production scheduling stage to improve the probability of performing the resulting schedule. So, the need of complete rescheduling of the production plan is reduced and more effective reactive scheduling strategies can be applied ...

Get price

Process scheduling under uncertainty: Review and ...

05-04-2008  Uncertainty in process operations can originate from many aspects, such as demand or changes in product orders or order priority, batch or equipment failures, processing time variability, resource changes, recipe variations, or both etc. Based on the nature of the source of uncertainty in a process, a suitable classification has been proposed by Pistikopoulos (1995) as follows: (i) model ...

Get price

Systematic assessments of uncertain demand effects on ...

Systematic assessments of uncertain demand effects on multiproduct batch process design using a multi-objective optimization technique December 2000 Computer Aided Chemical Engineering 8

Get price

The Determination of Uncertainties in Charpy Impact Testing

ABCR uncertainty of testing a batch of five CRM specimens e BCR uncertainty of the Certified value of CRM ... Charpy impact machine 10 tests (5 x 2 sets of specimens) must be carried out periodically using a single CRM. However, for a laboratory making impact tests on a range of alloys, more

Get price

Five Factors That Can Affect Your Weighing System’s Accuracy

temperature effect on the load cell at zero load causes the cell’s entire output range to shift. But if the load cell re-zeroes (that is, tares in the net-weight mode) before it starts the weighing cycle -- such as in a batching application -- you don’t need to be concerned about this temperature effect on zero load.

Get price

LESSON 9: MEASUREMENT AND UNCERTAINTY

Uncertainty of Measurement It tells something about its quality. Uncertainty of measurement is the doubt that exists about the result of any measurement. Expressing uncertainty of measurement Two numbers are really needed in order to quantify an uncertainty. One is the width of the margin, or interval. The other is a confidence level, and ...

Get price

Preventing flow problems with reliable bulk solids ...

06-09-2019  Preventing flow problems with reliable bulk solids handling equipment design. A proven and practical scientific approach for designing bins and feeders based on a material’s flow properties. Josh Marion. Sep 6th, 2019. Figure 1. Two no-flow problems, cohesive arching (a), and stable rathole (b). Images courtesy of Jenike Johanson.

Get price

Guidance for Industry, Q7A Good Manufacturing Practice ...

24-09-2001  If equipment is dedicated to manufacturing one intermediate or API, individual equipment records are not necessary if batches of the intermediate or API follow in traceable sequence.

Get price

Accuracy, Precision Resolution :: Electronic Measurements

18-12-2017  Measurement uncertainty. Measurement uncertainties can be divided into systematic and random measurement errors. The systematic errors are caused by abnormalities in gain and zero settings of the measuring equipment and tools. The random errors caused by noise and induced voltages and/or currents. Definition accuracy and precision

Get price

Using S-graph to address uncertainty in batch plants ...

07-07-2009  Processes and markets uncertainties make batch plants a complex environment to manage production activities. Uncertainties may cause deviations and infeasibilities in predefined schedules; this may result in poor planning and inefficient utilization of materials. Consequently, the relevance of explicitly incorporating variability in the scheduling formulation in order to offer more efficient ...

Get price

Systematic assessments of uncertain demand effects on ...

Systematic assessments of uncertain demand effects on multiproduct batch process design using a multi-objective optimization technique December 2000 Computer Aided Chemical Engineering 8

Get price

The Determination of Uncertainties in Charpy Impact Testing

ABCR uncertainty of testing a batch of five CRM specimens e BCR uncertainty of the Certified value of CRM ... Charpy impact machine 10 tests (5 x 2 sets of specimens) must be carried out periodically using a single CRM. However, for a laboratory making impact tests on a range of alloys, more

Get price

(PDF) Evaluation of the Effects of a Machine Failure on ...

22-12-2018  The impact of machine failures must be minimized. Preventive maintenance is carried out in order to keep the production system at the high level of operation due to restricted resources.

Get price

Literature Review on Supply Uncertainty Problems: Yield ...

06-07-2017  This paper reviews the literature on two types of supply uncertainty: yield uncertainty and supply disruption. We discuss issues related to the yield uncertainty and performance in the context of systems with random yields. We discuss disruptions in the context of other forms of supply uncertainty and discuss common modelling approaches. We then discuss nearly 110 scholarly works on the topic ...

Get price

Five Factors That Can Affect Your Weighing System’s Accuracy

temperature effect on the load cell at zero load causes the cell’s entire output range to shift. But if the load cell re-zeroes (that is, tares in the net-weight mode) before it starts the weighing cycle -- such as in a batching application -- you don’t need to be concerned about this temperature effect on zero load.

Get price

Preventing flow problems with reliable bulk solids ...

06-09-2019  Preventing flow problems with reliable bulk solids handling equipment design. A proven and practical scientific approach for designing bins and feeders based on a material’s flow properties. Josh Marion. Sep 6th, 2019. Figure 1. Two no-flow problems, cohesive arching (a), and stable rathole (b). Images courtesy of Jenike Johanson.

Get price

Guidance for Industry, Q7A Good Manufacturing Practice ...

24-09-2001  If equipment is dedicated to manufacturing one intermediate or API, individual equipment records are not necessary if batches of the intermediate or API follow in traceable sequence.

Get price

Uncertainty Associated with Microbiological Analysis

Appendix J – STWG Part 3 – Uncertainty 7-8-06 Page 1 of 31 Uncertainty Associated with Microbiological Analysis 1. Introduction 1.1. There are only two absolute certainties in life: death and ...

Get price

Accuracy, Precision Resolution :: Electronic Measurements

18-12-2017  Measurement uncertainty. Measurement uncertainties can be divided into systematic and random measurement errors. The systematic errors are caused by abnormalities in gain and zero settings of the measuring equipment and tools. The random errors caused by noise and induced voltages and/or currents. Definition accuracy and precision

Get price
Contact us

Submit online

Please leave a message below and we will contact you as soon as possible.