Vistec Semiconductor Sysetms Group 6 Ding Chen Yee Wan Cheung Roya Pakzad Zach Rabinovich Megan...
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Transcript of Vistec Semiconductor Sysetms Group 6 Ding Chen Yee Wan Cheung Roya Pakzad Zach Rabinovich Megan...
Vistec Semiconductor Vistec Semiconductor SysetmsSysetms
Group 6Group 6
Ding ChenDing ChenYee Wan CheungYee Wan Cheung
Roya PakzadRoya PakzadZach RabinovichZach RabinovichMegan WhitteyMegan Whittey
Visctec Company ProfileVisctec Company Profile
Vistec produces all its Vistec produces all its products in Germanyproducts in Germany
Products include inspection Products include inspection systems, defect detection systems, defect detection and classification, and classification, metrology systems for metrology systems for mask and wafer mask and wafer manufacturing manufacturing
Vistec utilizes state of the Vistec utilizes state of the art electron beam art electron beam lithography and wafer lithography and wafer process controlprocess control
Vistec Current Database SystemVistec Current Database System
Database used now is in Lotus NotesDatabase used now is in Lotus NotesNo system in place to track "out of box" failures No system in place to track "out of box" failures of spare parts, it is important for the company to of spare parts, it is important for the company to know failure rates as well as who ordered, etc.know failure rates as well as who ordered, etc.Currently within Logistics department there are Currently within Logistics department there are few tracking systems in place to monitor and few tracking systems in place to monitor and improve current performanceimprove current performanceNeed to develop ways to track ingoing and Need to develop ways to track ingoing and outgoing parts to insure orderly acceptance and outgoing parts to insure orderly acceptance and rejection of various spares used by field service rejection of various spares used by field service organization to repair systems installed in fieldorganization to repair systems installed in field
Vistec Database Project SummaryVistec Database Project Summary
Provide a working Provide a working database which database which amends the flaws amends the flaws in the current in the current databasedatabase
Focus on the Focus on the OBF’s since it’s the OBF’s since it’s the company’s prioritycompany’s priority
DP I SummaryDP I Summary
We created: Overall Project Summary Textual summary of database requirements Simplified EER diagram from information from
client
DP II SummaryDP II Summary
We….Revised simplified EER diagramRelational Schema from EER diagram5 interesting queries described and why they are interesting to our client
1: Rank products by Instant Failure (OBF) 2: Helping managers set the warranty periods based on mean
time between failures 3: Rank all sales people by profits 4: Forecast the customer demands on each product type and
estimate the time required to produce products 5: Choose an optimal order quantity (EOQ) that will minimize the
storage and ordering costs.
DP III SummaryDP III Summary
We…Client DescriptionRevised simplified EER diagramRevised relational design schemaCreated and implemented tables in Microsoft Access
Created relationships between the tables5 interesting queries written in:
English Relational algebra and/or SQL
EER Diagram AssumptionsEER Diagram Assumptions
Each product is checked by the company before they Each product is checked by the company before they send it out to the customers, so that the product is send it out to the customers, so that the product is either OBF (out of box failure) or noteither OBF (out of box failure) or notEach customer only works with one sales rep.Each customer only works with one sales rep.Each sales rep. has at least one customerEach sales rep. has at least one customerEach factory has at least one factory workerEach factory has at least one factory workerEach factory worker only works at one factoryEach factory worker only works at one factoryEach stock stores at one factoryEach stock stores at one factoryEach warranty status and OBF will only be checked by Each warranty status and OBF will only be checked by one service engineer (i.e. no duplicate checking)one service engineer (i.e. no duplicate checking)
EER DiagramEER Diagram
Relational SchemaRelational Schema
Relational Schema (cont’d)Relational Schema (cont’d)
Relationship View in AccessRelationship View in Access
NormalizationNormalization
1NF:1NF:2.Customer (CID, Name, StreetAddress, PhoneNumber, City, State,
Zip)
Reason: The customer entity has no multivalued attributes assuming there’s only one phone number for each customer.
2NF:10.Order (OID, Date, Description, ESSN6a, CID2, PID1, Quantity)
Reason: No partial dependencies, everything is derived from the order id.
NormalizationNormalization
CPID CType Description PID Type Price
4. Component4. Component
1 FD1 FD
2FD2FD
Transitive Dependency Violates 3 NF
Normalization
CPID cType Description PID
Component 1Component 1
PID Type Price
Component 2Component 2
FD3 FD4
Query 1 Query 1
Find out which product types have most failure by Find out which product types have most failure by ranking percentage failure for each productranking percentage failure for each product
SELECT COUNT(R. TagNumber)/SUM(o.quantity)*100
FROM Returned_Produce R, OrderTo O
WHERE SUM(o.quantity) IN (SELECT SUM(O.quantity)
FROM ShipsTo S
GROUP BY S. PID)
GROUP BY R.PID
ORDER BY COUNT(R.TagNumber)/SUM (O.quantity)*100;
Query 2Query 2
Helping the company to set the warranty Helping the company to set the warranty periods based on mean time between failureperiods based on mean time between failure
SELECT RProd.PID, AVG(DATEDIFF(“day”, ShipTo.Date, RProd.Date_Returned)
From Returned_Product AS RProd, ShipTo
Where RProd.PID=ShipTo.PID, RProd.Type=ShipTO. Type, RProd. CID=ShipTo.CID
GROUP BY ShipTo.PID;
Query 2Query 2
Query 3Query 3
Rank all salesperson by profits (subtract salary Rank all salesperson by profits (subtract salary from the salesperson’s total sales)from the salesperson’s total sales)
3.1 Total_Sales_Query3.1 Total_Sales_Query
SELECT (p.Price*o.quantity)OrderTotalFROM Product AS p, Order AS o WHERE p.PID=o.PID AND o.Date LIKE ‘%2007’GROUP BY o.OID;
3.2 Profit_per_SalesPerson_Query3.2 Profit_per_SalesPerson_Query
SELECT SP.ESSN, (OT.OrderTotal*(1 - SP.Commision) – SP.Salary )ProfitsFROM SalesPerson AS SP, Order_Total_Query AS OT WHERE SP.ESSN=OT.ESSNORDER BY (OT.OrderTotal*(1 - SP.Commision) – SP.Salary )Profits;
Query 3Query 3
Query 4Query 4
Forecasting the customer demands on each product type based Forecasting the customer demands on each product type based on the historical demand data, and estimate the time require on the historical demand data, and estimate the time require producing the products by keep tract of the average time for producing the products by keep tract of the average time for supplier to deliver the component when placed order.supplier to deliver the component when placed order.
4.1 Average time for supplier4.1 Average time for supplier Select AVG (DATEDIFF (“d”, ORDERFROM. Date_Received, ORDERFROM. Date-Ordered))/*100FROM ORDERFROMGROUP BY ORDERFROM. Type;
4.2 Demand_Query4.2 Demand_QuerySelect SUM(ORDER.quantity) AS DemandTotal, ORDER.PID, ORDER.DateFrom ORDERGROUP BY ORDER.PIDORDER BY ORDER.DATE;
Query 4
Query 5Query 5Choose an optimal order quantity (EOQ) that will Choose an optimal order quantity (EOQ) that will minimize the storage and ordering costs.minimize the storage and ordering costs.
OrderingCost_Query SELECT C.Price AS OrderCost
FROM Component AS C;
HoldingCost_QuerySELECT StoredAt.HoldingCost AS HoldCostFROM StoredAt;GROUP BY StoredAt.PID;
EOQSELECT sqrt( 2*OC.OrderCost*D.DemandTotal/HC.HoldCost )FROM OrderingCost_Query AS OC, HoldingCost_Query AS
HC, Demand_Query AS D
Component & Feedback ReportsComponent & Feedback Reports
Component & Lithography TablesComponent & Lithography Tables
Vistec Semiconductor Vistec Semiconductor SysetmsSysetms
QuestionsQuestions
and and
AnswersAnswers