Please listen to the presentation, read detailed slides and return to first post to make your comments below the corresponding paper author's post.
Session Chair: Ahmed Moustafa
Session Theme: Machine Learning and Creativity
Session Number: 3
Paper No: 14
Session and Talk No: TS3-2
Type: Short
Co-authors: Daiki Setoguchi, Shun Okuhara, Ahmed Moustafa and Takayuki Ito
Title: Alternating offers protocol by automated negotiation based on constraint relaxation
Many to Many Matching of Agents with Nonlinear Utility FunctionShun Okuhara
The document proposes a negotiation matching protocol for agents with nonlinear utility functions. It involves the following steps:
1) Agents search for local optimal solutions in their nonlinear utility spaces using simulated annealing.
2) Agents generate bids representing high utility agreements and submit them to a mediator.
3) The mediator checks for overlaps between the bid sets to find successful matchings that maximize social utility.
Experimental results showed the proposed method approximated optimal solutions and social welfare increased with more bids. Future work involves validating effectiveness for larger-scale matching problems.
This document provides an overview of a presentation on automated negotiation given by Takayuki Ito from Nagoya Institute of Technology in Japan. The presentation covered four parts: an introduction to automated negotiation, bargaining approaches using game theory, multi-issue negotiation using heuristic approaches, and an automated negotiation agent competition. Ito discussed key concepts in negotiation like negotiation protocols, strategies, preferences, and Pareto optimality. For bargaining approaches, he summarized Nash's cooperative bargaining solution and Rubinstein's alternating offers model in non-cooperative games.
Wolfgang Richter, Agile CEO JIPP.IT, hat in seinem Vortrag beim letzten Scrum User Group Stammtisch (Mai 2016) zum Thema "Alternative Verrechnungsmethoden" mehrer Möglichkeiten zur Vertragsgestaltung in agilen Softwareprojekten beschrieben und analysiert.
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The document discusses contracting for agile software development projects, describing how agile approaches require collaboration and involvement across project teams, and research shows that using a time and materials contract under a framework agreement with a statement of work covering agile terms is the consensus for contracting agile projects effectively.
Many to Many Matching of Agents with Nonlinear Utility FunctionShun Okuhara
The document proposes a negotiation matching protocol for agents with nonlinear utility functions. It involves the following steps:
1) Agents search for local optimal solutions in their nonlinear utility spaces using simulated annealing.
2) Agents generate bids representing high utility agreements and submit them to a mediator.
3) The mediator checks for overlaps between the bid sets to find successful matchings that maximize social utility.
Experimental results showed the proposed method approximated optimal solutions and social welfare increased with more bids. Future work involves validating effectiveness for larger-scale matching problems.
This document provides an overview of a presentation on automated negotiation given by Takayuki Ito from Nagoya Institute of Technology in Japan. The presentation covered four parts: an introduction to automated negotiation, bargaining approaches using game theory, multi-issue negotiation using heuristic approaches, and an automated negotiation agent competition. Ito discussed key concepts in negotiation like negotiation protocols, strategies, preferences, and Pareto optimality. For bargaining approaches, he summarized Nash's cooperative bargaining solution and Rubinstein's alternating offers model in non-cooperative games.
Wolfgang Richter, Agile CEO JIPP.IT, hat in seinem Vortrag beim letzten Scrum User Group Stammtisch (Mai 2016) zum Thema "Alternative Verrechnungsmethoden" mehrer Möglichkeiten zur Vertragsgestaltung in agilen Softwareprojekten beschrieben und analysiert.
This document discusses lessons learned from service design projects in Japan. It outlines key points for successful service design, including having a good team that understands user needs, thinking from end-to-end rather than individual departments, keeping processes open and agile, and maintaining a consistent vision. It also identifies challenges such as gaining stakeholder consent and ensuring data interoperability between organizations. Finally, it argues for the importance of transparency through a service design scorecard to continually evaluate and improve existing services over time.
This document provides an overview and agenda for a seminar on contract strategy. It discusses developing a contract strategy by considering risk allocation and different types of contracting approaches. It covers price-based approaches like bills of quantities and schedules of rates as well as cost-based approaches like cost reimbursable contracts. The seminar aims to provide knowledge of different contract strategies and when each may be appropriate. It also discusses developing a procurement process and principles of risk allocation and sharing.
The document discusses contracting for agile software development projects, describing how agile approaches require collaboration and involvement across project teams, and research shows that using a time and materials contract under a framework agreement with a statement of work covering agile terms is the consensus for contracting agile projects effectively.
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The document discusses opportunities for greater involvement of third sector organizations (TSOs) in commissioning and procurement by local governments. It outlines barriers currently facing TSOs, such as short-term funding and unrealistic contract requirements. The document proposes following principles of good commissioning, including understanding user needs by engaging with TSOs, putting user outcomes at the heart of the process, and ensuring fair and transparent contracting. Adopting these principles and addressing barriers could help maximize the benefits TSOs provide, such as specialized expertise and services to hard-to-reach groups, leading to better outcomes for communities.
The document outlines various procurement strategies and contract forms for construction projects. It discusses traditional procurement, management contracting, and design-build procurement methods. For each method, it describes the process, advantages, and disadvantages. It also examines standard contract forms used in Malaysia, including the PAM 2006, JKR 203A, and FIDIC contracts. Based on the project details of developing a 20-storey condominium, the document recommends using a traditional procurement method with a PAM 2006 contract form due to its common use for private sector building projects in Malaysia.
The document outlines various procurement strategies and contract forms for construction projects. It discusses traditional procurement, management contracting, and design-build procurement methods. For each method, it describes the process, advantages, and disadvantages. It also examines standard contract forms used in Malaysia, including the PAM 2006, JKR 203A, and FIDIC contracts. Based on the project details of developing a 20-storey condominium, the document recommends using a traditional procurement method with a PAM 2006 contract form due to its common use for private sector building projects in Malaysia.
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Greg Hutchings is an expert in distributed agile teams and alternative contractual forms for engaging large distributed agile teams. The document outlines Greg's background and experience and provides an agenda for a session on distributed agile teams and contracts. The session will cover building and supporting contracts for distributed agile teams, case studies, and different types of contractual agreements like fixed-bid, time and materials, and pay for production contracts. It will also discuss key elements to address in contracts like planning releases and iterations, defining roles and responsibilities, and estimating work.
Construction Futures Wales - NEC Contracts Overview WorkshopRae Davies
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The document is a masters project presentation that discusses panel contractor satisfaction and whether collaboration and partnering are happening in a bespoke contract. It contains an introduction that outlines the background, problem statement, objectives, key questions, scope, and significance of the study. It then reviews relevant literature on topics like panel contractor satisfaction, bespoke contracts, collaborative approaches, and partnering. The methodology section discusses the research design, survey method, sampling, Likert scale, data analysis, and research framework. Finally, it outlines how the findings, results from data collection, testing of data goodness, and conclusions will be discussed.
The document discusses practical approaches for public sector organizations to work with consultants and suppliers to obtain better value. It outlines the large amount spent on consultants annually in the UK and potential savings. It then covers various procurement topics like the procurement cycle, developing requirements, selection criteria, contract management and reviews. The goal is to provide guidance on navigating the procurement process to ensure value is received from external consultants and suppliers.
The document is a presentation by a quantity surveying group advising their client Mr. Wong on tendering methods and procedures for his 30-storey condominium project in Penang Island. As the quantity surveyor, the group must advise Mr. Wong on the types of tender documentation and tendering methods available. This includes open tendering, selective tendering, and negotiated tendering. For each method, the presentation outlines the advantages and disadvantages. It also discusses factors for a contractor, Mr. Chong, to consider before deciding to participate in the tender.
This document provides an analysis and recommendation of different procurement methods for a proposed 20-storey condominium project in Kajang, Selangor. It summarizes the key characteristics of traditional, management contracting, and design-build procurement methods. It recommends the traditional procurement method as most suitable due to its widespread use in Malaysia and lower risk compared to less experienced forms. The document also reviews common contract forms like PAM 2006, JKR 203A, and FIDIC, recommending PAM 2006 for its applicability to private sector building projects.
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1) Servicescape design involves multiple phases including strategy, concept programming, design, and implementation, using methods like interviews, observations, and group works to gather customer perspectives.
2) The goal is to understand and facilitate positive experiences for customers and employees through purposeful design of the physical space (servicescape).
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This document discusses the procurement method, tendering method, and contract arrangement for a construction project. It recommends the traditional procurement method to give the client full design control. It proposes using a two-stage selective tendering process to ensure contractor quality and transparency. Under this process, contractors will be prequalified before a select few are invited to tender. Finally, it suggests using a lump sum contract to minimize price variations and help the client's budget control.
This document provides information about an assignment for a Contracts Management in Projects course. It lists 6 questions related to project contracts, bidding processes, contract structure, benchmarking, procurement, and public-private partnership contract forms. Students can purchase the solved assignment from the contact provided for Rs. 125 per question. The assignment requires answering all 6 questions within 300-400 words each.
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TS3-2: Daiki Setoguchi from Nagoya Institute of Technology
1. Alternating offers protocol by
automated negotiation based
on constraint relaxation
Nagoya Institute of Technology Kyoto University
Daiki Setoguchi, Shun Okuhara, Ahmed Moustafa, Takayuki Ito
2. Introduction
Automated Negotiation Agent
An agent that negotiates on behalf of human beings and aims
to obtain better negotiation results than human beings
Purpose of automated negotiation
• To make reasonable consensus on complex and large-scale
negotiations
• To simulate and analyze real-world negotiations
• To reduce the social burden (time, personnel) for negotiations
Example: sales negotiation, scheduling negotiation, transportation system, etc.
It is rarely actually applied in current research[1]
• There is a difference between the experimental setup used in the research
and the actual problem
• Users have difficulty trusting automated negotiation agent
2
[1] Baarslag, Tim, et al. "When will negotiation agents be able to represent us? The challenges and opportunities for autonomous negotiators." (2017): 4684-4690.
3. Shared and Local Issue Model(SL Model)[1]
3
[1] Okuhara, Shun, and Takayuki Ito.
"A Compromising Strategy Based on Constraint Relaxation for Automated Negotiating Agents."
Pacific Rim International Conference on Artificial Intelligence. Springer, Cham, 2019.
There are shared issues and individual
issues, and each agent advances
negotiations by offering individual
issues.
During negotiations, each agent
compromises by removing constraints
The utility value of each proposed
agreement is calculated based on the
satisfied constraints.
4. Alternating Offers Protocol[2]
4
Agent A Agent B
AcceptA
AcceptB
Bid
Bid
OfferA
OfferB
EndNegotiationA EndNegotiationB
Action of the negotiator
• Offer
• Accept
• EndNegotiation
Bid : Candidates for a draft agreement
[2] Rubinstein, Ariel. ”Perfect equilibrium in a bargaining model.” Econometrica: Journal of the Econometric Society (1982): 97-109.
5. Proposed Model
SL Model
• Negotiations for each constraint make it easy to
explain the negotiation details
• Uses a simultaneous proposal type negotiation model
Alternating Offers Protocol
• Alternate proposal type negotiation model
• Since it is possible to refer to the proposal of the
other party, it is easy to agree
• Existing researches are difficult to explain because
they negotiate by value rather than constraint
5
Proposal of alternating proposal type negotiation model that
can explain negotiation result
6. Proposed Model
6
Agent A
decision to end
Agent B
decision to end
AcceptA
AcceptB
Offer with constraint
relaxation
Offer with constraint
relaxation
OfferA
OfferB
Yes
Yes
No
No
Start
Agents negotiate by alternately proposing the process of constraint relaxation
proposed in the SL model
8. Experiment
Number of simulation : 1000
Maximum round : 5 round
Number of agent constraints : 5
Used Agent compromising method :
random、min、distance、distance_min
8
Comparison of proposed model and SL model in terms of
agreed number and consensus result
9. Used Agent
9
1
2
3
1
2
3
Agent
Issue Ii1
C1
C2
1
2
3
1
2
3
Agent
1
2
3
1
2
3
Agent
1
2
3
Issue Is
Random Min. Distance Distance_min.
C1
C2
C1
C2
C3
1
2
3
1
2
3
Agent
1
2
3
C1
C2
C3
C4
Either C1 or C2 is
deleted
Delete C2 which
is low utility
Delete C3 which
is far from Is
Delete C4 which is far
from Is and low utility
Issue Ii1
Issue Is
Issue Ii1
Issue Is
Issue I1
Issue IsIssue Ii2 Issue Ii2
100
50
100
50 10
40
Negotiate with four agents with different methods
10. Result
Compromising
method
Round
Social
Welfare
Agreed num
Agreed Social
Welfare
random 3.244 23.166 189 122.574
min 3.164 25.879 209 123.821
distance 3.18 25.657 205 125.158
distance_min 3.204 24.348 199 122.354
10
Compromising
method
Round
Social
Welfare
Agreed num
Agreed Social
Welfare
random 3.252 23.625 187 126.335
min 3.232 23.295 192 121.326
distance 3.244 23.123 189 122.344
distance_min 3.256 23.076 186 124.067
• Proposed Model
• Conventional SL Model
11. Conclusions
Background and Purpose
• Automated negotiation agents that negotiate on behalf of human beings are
attracting attention
• It is necessary to create a model that is easy for humans to explain in
order to apply it to actual negotiation problems
Proposed Model
• Alternating offers protocols by automated negotiation based on constraint
relaxation
• Negotiations for each constraint make it easy to explain the negotiation details
• As a result of experiments, we found that the proposed model has more
contracts than the existing model.
Future works
• Perform simulation by increasing agent
11
Editor's Notes
I would like to talk about my research titled “Alternating offers protocols by automated negotiation based on constraint relaxation”.
Now, let me begin.
This is research introduction.
The research theme is automated negotiation agent.
To explain, an agent whose purpose is to negotiate on behalf of human beings and to obtain better negotiation results than human beings.
In particular, it helps humans negotiate better by:
Making reasonable consensus on complex and large-scale negotiation problems.
Simulating and analyzing real negotiations.
and reducing the social burden of negotiations And so on.
However, it has been pointed out that current research is rarely applied to real problems. The reason is,
こちらが研究背景のスライドとなります
研究背景といたしまして自動交渉エージェントというものがございます.
これは人間の代理として交渉を行い,人間よりも良い交渉結果を得ることを目的としたエージェントです.
このエージェントが行う自動交渉の目的として,複雑で大規模な交渉問題での合理的な合意形成を行うこと,現実の交渉をシミュレートして解析すること,交渉にかかる社会的負担を軽減することなどが挙げられます.
しかし、現在の研究は実際の問題に応用されることはほとんどないことが指摘されています。
その理由は、
I will explain the SL model handled in this research.
In the SL model, there are shared issues and individual issues, and each agent advances negotiations by offering shared issues.
The negotiating agents try to compromise by relaxing the constraints.
Utility value means the score of how happy users are, the utility value of each candidate agreement is calculated according to the satisfied constraints.
In this model, the constraints are easy for humans to explain, so the content of the negotiation can be clarified.
本研究で取り扱う,SLモデルについて説明をさせていただきます.
SLモデルでは共有論点と個人論点というものがあり,各エージェントは共有論点をOfferし合うことで交渉を進めます.
効用値はユーザがどの程度嬉しいのかというスコアを意味するのですが,
各合意案候補の効用値は満たした制約によって計算されます.
このモデルは制約が人間にとって説明しやすい為、交渉の内容を明確にすることができます。
This figure is Alternating Offers Protocol proposed by Rubinstein.
There is a lot of research on Alternative offers, and game theory and heuristic based approaches have been taken, and Alternative offers are defined from three actions, using bids that are contract candidates.
The first action is an Offer that proposes a Bid that the agent wants to propose from among the candidate proposals, the second action is an Accept that accepts the Bid that the negotiating partner has proposed, and the third action is an EndNegotiation that is the action to abandon the negotiation .
’’’
I will explain the series of flows.
First, Agent A performs Offer, and passes the selection right to Agent B.
Agent B decides whether to accept the proposed Bid.
If Agent B accepts it, the negotiation will be terminated with the proposal proposed by Agent A as the agreement proposal.
If it does not accept, Agent B proposes Bid as a counter offer, and passes the selection right to Agent A.
Agent A decides whether to accept as well.
This process is repeated until an offer is accepted, or an agent sends End.
’’’
この図はルビンスタイン(Rubinstein) が提唱する Alternating Offers プロトコルです.
Alternating Offers に関する研究は多く存在し,ゲーム 理論やヒューリスティックスに基づくアプローチがなされている
Alternating Offersでは,合意案候補(Bid)を扱い,3つの行動から定義される.
一つ目はエージェントが合意案候補の中から自分の提案したいBidを提案するOffer,2つ目は交渉相手が提案してきたBidを受け入れるOffer,3つめは交渉を放棄するEndNegotiationの3つの行動です.
一連の流れについて説明します.
まずエージェントAがOfferを行い,選択権をエージェントBに渡します.エージェントBは提案されたBidに対して,受容するかどうかを決定します.
受容する場合はエージェントAが提案したBidを合意案として交渉を終了します.
受容しない場合,エージェントBがカウンターオファーとしてBidを提案し,選択権をエージェントAに渡します.
エージェントAは同様に受容するかどうかを決定します.
一連の流れを繰り返し行い,合意案を決定します.
もし,これ以上交渉したく無い場合はEndNegotiationを選択することができ,その場合は交渉決裂として終了します.
It is a feature of SL model.
I propose the application of SL model using Alternating Offers Protocol
It is a feature of Alternating Offers Protocol
I propose an alternate proposal type negotiation model that can explain the negotiation result
In my proposed model, agents negotiate by alternately proposing the constraint relaxation process proposed in the SL model.
Negotiation agent can choose the same action as Alternating Offers Protocol, and proceed with the negotiation in the same way as Alternating Offers Protocol.
The negotiation result is performed for each constraint, so it is easy to explain to humans.
Also, this makes it easier to agree than the SL model, which is a simultaneous negotiation.
提案モデルでは、エージェントはSLモデルで提案されている制約緩和のプロセスを交互提案することで交渉を行う。
交渉エージェントはAlternating Offersと同様の行動を選択でき、Alternating Offersと同様に交渉を進めていく。
これによって交渉結果が制約ごとに行われているので人間への説明が容易である。
また、同時交渉であるSLモデルより合意しやすいモデルになる。
I will explain the series of flows.
First, Agent A offers Agent B. Agent B decides whether to accept the Offer.
Next, if Agent B is not accepted, it relaxes the constraints referring to the proposal proposed by Agent A, and offers to Agent A. After that, Agent A does the same. Do this repeatedly and negotiate until one agrees.
If no agreement is reached, the negotiation will be broken.
一連の流れについて説明します。
まず、エージェントAはエージェントBにOfferします。エージェントBはそのOfferを受け入れるかどうかを決定します。
エージェントBは受け入れられない場合はエージェントAの提案した案を参考に制約緩和を行い、エージェントAにOfferします。
その後、エージェントAも同様に行います。
これを繰り返し行い、どちらかが合意するまで交渉します。
合意されなかった場合は交渉決裂します。
Here is the experimental setup.
I compared the number of agreements and the agreement results between the proposed model and the SL model.
The number of experiments is 1000 and the maximum round is 5. Each agent has 5 constraints.
I also experimented with four methods of agent constraint relaxation: random, min, distance, and distance_min.
こちらが実験設定です。
合意数と合意結果について提案モデルとSLモデルの比較を行いました。
実験回数は1000回であり、最大ラウンドは5ラウンド。
各エージェントの持つ制約は5つに設定しました。
また、エージェントの持つ制約緩和の手法はrandom, min, distance, distance_minの4つについて実験しました。
This is the agent constraint relaxation method used in the experiment.
Random is an agent that randomly removes constraints from the constraints of the agent.
Min is an agent that removes the constraint with the lowest utility value from the constraints of the agent.
Distance is an agent that removes the farthest constraint from Is among the constraints of the agent.
Distance_min is an agent that removes a constraint with a low utility value far from Is in the constraints of the agent.
これが実験で用いるエージェントの制約緩和の手法です。
Randomはエージェントの持つ制約の中で制約をランダムに取り除くエージェントです。
Minはエージェントの持つ制約の中で一番効用値の低い制約を取り除くエージェントです。
Distanceはエージェントの持つ制約の中でIsからもっとも遠い制約を取り除くエージェントです。
Distance_minはエージェントの持つ制約の中でIsから遠く効用値の低い制約を取り除くエージェントです。
Here are the experimental results.
Round average, social welfare average, number of agreements, social welfare when agreed.
Regarding the number of rounds and the number of agreements, the proposed model performed well on all agents.
Social welfare has good results for agents with min, distance and distance_min.
The agreed social welfare has good results for agents with min and distance.
これが実験結果です。
ラウンドの平均、社会的余剰平均、合意数、合意したときの社会的余剰の表です。
ラウンド、合意数は提案したモデルが全てのエージェントでよい結果を出しました。
社会的余剰はmin, distance, distance_minのエージェントについて良い結果を得られました。
合意した社会的余剰がmin, distanceのエージェントについて良い結果を得られました。
It is a conclusions slide.
Thank you for listening.